# Fuchsia F28 release notes **Date:** October 9, 2025 **Version:** F28 The following changes have been implemented: ## Audio The following updates have been made for Audio: - **Modernized the `audio_recording` service** with a new FIDL API that uses Zircon Sockets for host-driven testing and refactored it for improved reliability and simplicity. - Changes: [fxr/1259507](https://fuchsia-review.googlesource.com/c/fuchsia/+/1259507), [fxr/1292548](https://fuchsia-review.googlesource.com/c/fuchsia/+/1292548) - **Enhanced test coverage for the audio driver `signalprocessing` protocol.** This includes adding comprehensive validation for topologies, elements, and state management, and updating the virtual audio test driver to facilitate these more rigorous tests. - Changes: [fxr/1261446](https://fuchsia-review.googlesource.com/c/fuchsia/+/1261446), [fxr/1261669](https://fuchsia-review.googlesource.com/c/fuchsia/+/1261669), [fxr/1271544](https://fuchsia-review.googlesource.com/c/fuchsia/+/1271544), [fxr/1271879](https://fuchsia-review.googlesource.com/c/fuchsia/+/1271879), [fxr/1272228](https://fuchsia-review.googlesource.com/c/fuchsia/+/1272228), [fxr/1275645](https://fuchsia-review.googlesource.com/c/fuchsia/+/1275645), [fxr/1275682](https://fuchsia-review.googlesource.com/c/fuchsia/+/1275682), [fxr/1283529](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283529) - **Improved the `ffx audio` developer tool** with a more robust `play` command, data-path tracing for diagnostics, and more intuitive output for the `device info` command. - Changes: [fxr/1283469](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283469), [fxr/1296889](https://fuchsia-review.googlesource.com/c/fuchsia/+/1296889), [fxr/1300168](https://fuchsia-review.googlesource.com/c/fuchsia/+/1300168) - **Improved the reliability of `audio_driver_admin_tests`** by adding delays after test cases to mitigate intermittent `ZX_ERR_ALREADY_BOUND` failures. - Changes: [fxr/1279375](https://fuchsia-review.googlesource.com/c/fuchsia/+/1279375), [fxr/1301624](https://fuchsia-review.googlesource.com/c/fuchsia/+/1301624) - **Updated audio driver tests to validate** that drivers supporting stereo-only `DaiFrameFormats` (e.g., I2S) correctly advertise stereo-only support. - Changes: [fxr/1288524](https://fuchsia-review.googlesource.com/c/fuchsia/+/1288524) ## Bluetooth The following updates have been made for Bluetooth: - **Significant improvements to Hands-Free Profile (HFP) Hands Free role** - Changes: [fxr/1294025](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294025), [fxr/1292774](https://fuchsia-review.googlesource.com/c/fuchsia/+/1292774), [fxr/1006612](https://fuchsia-review.googlesource.com/c/fuchsia/+/1006612), [fxr/1002861](https://fuchsia-review.googlesource.com/c/fuchsia/+/1002861), [fxr/990257](https://fuchsia-review.googlesource.com/c/fuchsia/+/990257), [fxr/1257844](https://fuchsia-review.googlesource.com/c/fuchsia/+/1257844) - Bugs: [b/42081254](https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=42081254) - **Improved RFCOMM stability and performance** by implementing a backpressure mechanism, separating the RX/TX datapaths, and optimizing credit watermark levels to prevent packet loss in high-throughput scenarios. - Changes: [fxr/1317645](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317645), [fxr/1310426](https://fuchsia-review.googlesource.com/c/fuchsia/+/1310426), [fxr/1309362](https://fuchsia-review.googlesource.com/c/fuchsia/+/1309362), [fxr/1309305](https://fuchsia-review.googlesource.com/c/fuchsia/+/1309305) - Bugs: [fxb/428738649](https://fxbug.dev/428738649) - **Introduced a new testing affordance library and a `bt-affordances-server` component** , allowing Bluetooth control via `ffx bluetooth`. - Changes: [fxr/1273999](https://fuchsia-review.googlesource.com/c/fuchsia/+/1273999), [fxr/1252446](https://fuchsia-review.googlesource.com/c/fuchsia/+/1252446), [fxr/1222506](https://fuchsia-review.googlesource.com/c/fuchsia/+/1222506) - Bugs: [fxb/409779607](https://fxbug.dev/409779607) - **Refactored Bluetooth host initialization** to dynamically offer HCI drivers to specific `bt-host` components instead of exposing a shared device directory, improving security and flexibility. - Changes: [fxr/1323485](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323485), [fxr/1312284](https://fuchsia-review.googlesource.com/c/fuchsia/+/1312284), [fxr/1321904](https://fuchsia-review.googlesource.com/c/fuchsia/+/1321904), [fxr/1310865](https://fuchsia-review.googlesource.com/c/fuchsia/+/1310865) - Bugs: [fxb/369597375](https://fxbug.dev/369597375) - **Added a new FIDL API** to allow clients to synchronize with an LE periodic advertising train. - Changes: [fxr/1307249](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307249) - **Enable low power mode** on supported Broadcom controllers at startup to reduce overall power consumption. - Changes: [fxr/1271388](https://fuchsia-review.googlesource.com/c/fuchsia/+/1271388) - **Speed up A2DP source integration tests** by allowing for more parallel test execution. - Changes: [fxr/1328367](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328367) - Bugs: [fxb/42148322](https://fxbug.dev/42148322) - **Fixed and enabled previously disabled AT command tests** to ensure they run as part of continuous integration checks. - Changes: [fxr/1329344](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329344) - **Corrected the behavior of `WatchState` in the test `HostServer`** to function properly as a Hanging Get, improving GAP test reliability. - Changes: [fxr/1322704](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322704) - **Enabled the `bt-snoop-from-snapshot` tool to process from Starnix bugreports** - Changes: [fxr/1310205](https://fuchsia-review.googlesource.com/c/fuchsia/+/1310205) ## Build The following updates have been made for Build: - **Build the Fuchsia IDK (Integratable Developer Kit) using Bazel instead of GN** , a major milestone in the build system migration. This change includes removing legacy `meta.json` generation scripts and adding new validation for SDK atom categories, API areas, and header files. - Changes: [fxr/1290384](https://fuchsia-review.googlesource.com/c/fuchsia/+/1290384), [fxr/1297511](https://fuchsia-review.googlesource.com/c/fuchsia/+/1297511), [fxr/1313807](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313807) - Bugs: [fxb/413071161](https://fxbug.dev/413071161), [fxb/417997995](https://fxbug.dev/417997995), [fxb/419105478](https://fxbug.dev/419105478) - **Fixed a critical bug that broke incremental Bazel builds** by correcting how Clang toolchain version files are tracked. - Changes: [fxr/1326824](https://fuchsia-review.googlesource.com/c/fuchsia/+/1326824) - Bugs: [fxb/432809101](https://fxbug.dev/432809101) - **Improved Remote Build Execution (RBE) performance** by directing multi-threaded Rust and C++ ThinLTO link jobs to larger workers and improving cache hits. - Changes: [fxr/1283945](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283945), [fxr/1284784](https://fuchsia-review.googlesource.com/c/fuchsia/+/1284784), [fxr/1271296](https://fuchsia-review.googlesource.com/c/fuchsia/+/1271296) - **Improved build performance for products** by performing image assembly and product bundle creation in a single, streamlined action. - Changes: [fxr/1317731](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317731) - **Updated the build regenerator to print timings for slow steps** to help identify performance regressions, and fixed a bug that caused unnecessary regeneration on every build. - Changes: [fxr/1313624](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313624), [fxr/1308884](https://fuchsia-review.googlesource.com/c/fuchsia/+/1308884) - Bugs: [fxb/427689271](https://fxbug.dev/427689271) - **Enabled frame pointers for RISC-V builds** , and now correctly use the atomic ('A') ISA extension during LTO builds. - Changes: [fxr/1265864](https://fuchsia-review.googlesource.com/c/fuchsia/+/1265864), [fxr/1266384](https://fuchsia-review.googlesource.com/c/fuchsia/+/1266384) - Bugs: [fxb/42086180](https://fxbug.dev/42086180) ## Cobalt The following updates have been made for Cobalt: - **Simplified channel setting logic** by replacing the `SetSoftwareDistributionInfo` function with the more direct `SetChannel`. - Changes: [fxr/1330621](https://fuchsia-review.googlesource.com/c/cobalt/+/1330621) - **Introduced cookie bucket support** to the report definition for computing confidence intervals. This change also clarifies naming by renaming `COOKIE_BUCKET_ID` to `COOKIE_BUCKET`. - Changes: [fxr/1297673](https://fuchsia-review.googlesource.com/c/cobalt/+/1297673), [fxr/1290824](https://fuchsia-review.googlesource.com/c/cobalt/+/1290824) ## Component Framework The following updates have been made for Component Framework: - **Added a new built-in dispatcher component** that can dynamically launch worker components in response to capability requests. - Changes: [fxr/1245065](https://fuchsia-review.googlesource.com/c/fuchsia/+/1245065) - Bugs: [fxb/415968290](https://fxbug.dev/415968290) - **Added a `GetChildOutput` function to the `fuchsia.component.Realm` protocol** , allowing a parent to access a child's output dictionary using bedrock APIs. - Changes: [fxr/1269705](https://fuchsia-review.googlesource.com/c/fuchsia/+/1269705) - Bugs: [fxb/415965735](https://fxbug.dev/415965735) - **Reduced memory usage significantly in `component_manager`** through optimizations like more efficient data representations for monikers, lazy object instantiation, and on-demand request generation. - Changes: [fxr/1282667](https://fuchsia-review.googlesource.com/c/fuchsia/+/1282667), [fxr/1262564](https://fuchsia-review.googlesource.com/c/fuchsia/+/1262564) - **Enhanced developer tooling and observability.** The `ffx component doctor` command can now inspect dictionary contents, heapdump instrumentation can be enabled for components, and component instance IDs are now exposed via Inspect. - Changes: [fxr/1276851](https://fuchsia-review.googlesource.com/c/fuchsia/+/1276851), [fxr/1245024](https://fuchsia-review.googlesource.com/c/fuchsia/+/1245024), [fxr/1305244](https://fuchsia-review.googlesource.com/c/fuchsia/+/1305244) - **Fixed a crash** that occurred when a component exposed two capabilities with the same target name to different sources, such as `parent` and `framework`. - Changes: [fxr/1294625](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294625) - **Marked VMOs created from bootfs as non-resizable** , improving efficiency and preventing mapping failures. - Changes: [fxr/1328664](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328664) - Bugs: [b/293969808](https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=293969808) - **Made the `fuchsia.time.UtcClock` memory-mappable** for more efficient clock reads from performance-sensitive components like Starnix. - Changes: [fxr/1295066](https://fuchsia-review.googlesource.com/c/fuchsia/+/1295066) - **Updated Component Manager's sandbox implementation to use the modern `fuchsia.io/Directory.Open` method** , improving compatibility with the latest `fuchsia.io` servers. - Changes: [fxr/1319626](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319626) - Bugs: [fxb/324111518](https://fxbug.dev/324111518) - **Merged the `full-resolver` component into `pkg-resolver`.** This merge reduces the memory footprint on eng builds by removing a component from the core set. - Changes: [fxr/1274091](https://fuchsia-review.googlesource.com/c/fuchsia/+/1274091) ## Diagnostics The following updates have been made for Diagnostics: - **Improved Archivist's reliability and performance** with a new panic hook, a more efficient `IOBuffer` for its internal log buffer, and by moving serial log writes to a dedicated thread to prevent blocking. - Changes: [fxr/1329884](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329884), [fxr/1291128](https://fuchsia-review.googlesource.com/c/fuchsia/+/1291128), [fxr/1319904](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319904) - Bugs: [fxb/319500512](https://fxbug.dev/319500512) - **Implemented a new `Flush` method for the logging service** to guarantee that all buffered logs are written, which also resolves a potential termination issue in Archivist. - Changes: [fxr/1322376](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322376), [fxr/1324244](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324244) - **Made reading Inspect data more robust against unresponsive components.** Timeouts are now applied to individual FIDL connections for lazy nodes, preventing a single slow node from blocking the entire snapshot. - Changes: [fxr/1256184](https://fuchsia-review.googlesource.com/c/fuchsia/+/1256184), [fxr/1257865](https://fuchsia-review.googlesource.com/c/fuchsia/+/1257865) ## Display The following updates have been made for Display: - **Migrated the `ti-lp8556` and `vim3-pwm-backlight` drivers to DFv2** , replacing devfs nodes with advertised FIDL services for improved component interaction. - Changes: [fxr/1323445](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323445), [fxr/1323684](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323684) - **Improved the stability of the Display Coordinator** by unifying its threading model, ensuring synchronous client teardown to prevent use-after-free errors, and fixing an image cleanup race condition. - Changes: [fxr/1328164](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328164), [fxr/1328809](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328809), [fxr/1329630](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329630) - Bugs: [fxb/336394440](https://fxbug.dev/336394440) - **Advanced the migration from Banjo to FIDL** for the display driver interface by introducing several FIDL adapters (`EngineListener`, `DisplayEngine`) and a unified `EngineListener` interface to abstract the underlying protocol. - Changes: [fxr/1331050](https://fuchsia-review.googlesource.com/c/fuchsia/+/1331050), [fxr/1323744](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323744), [fxr/1063854](https://fuchsia-review.googlesource.com/c/fuchsia/+/1063854) - Bugs: [fxb/341156315](https://fxbug.dev/341156315), [fxb/314126494](https://fxbug.dev/314126494) - **Simplified the display FIDL and Banjo APIs** by renaming ambiguous types (such as `DisplayMode` to `DisplayTiming`), removing the redundant `BufferId` struct, and streamlining the `CheckConfig()` method. - Changes: [fxr/1330862](https://fuchsia-review.googlesource.com/c/fuchsia/+/1330862), [fxr/1329435](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329435), [fxr/1294328](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294328) - Bugs: [fxb/314126494](https://fxbug.dev/314126494), [fxb/433745174](https://fxbug.dev/433745174), [fxb/422844790](https://fxbug.dev/422844790) - **Enhanced VSync handling** by requiring valid configuration stamps for all VSync events across all display drivers and removing the unused ability for clients to opt-out of VSyncs after enabling them. - Changes: [fxr/1329640](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329640), [fxr/1332953](https://fuchsia-review.googlesource.com/c/fuchsia/+/1332953) - Bugs: [fxb/401388764](https://fxbug.dev/401388764), [fxb/316631158](https://fxbug.dev/316631158) - **Strengthened configuration validation** by rejecting empty configurations, enforcing the driver-declared `max_layer_count`, and adding support for specifying a `display_destination` for color layers. - Changes: [fxr/1324487](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324487), [fxr/1310344](https://fuchsia-review.googlesource.com/c/fuchsia/+/1310344), [fxr/1325924](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325924) - Bugs: [fxb/394413629](https://fxbug.dev/394413629), [fxb/427978301](https://fxbug.dev/427978301), [fxb/314126494](https://fxbug.dev/314126494) - **Improved developer experience** by adding `std::format` support to numerous display API types and modernizing the internal `api-types` C++ library with better type safety and conversion patterns. - Changes: [fxr/1332459](https://fuchsia-review.googlesource.com/c/fuchsia/+/1332459), [fxr/1319064](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319064) - Bugs: [fxb/314126494](https://fxbug.dev/314126494), [fxb/430957800](https://fxbug.dev/430957800) ## Driver Framework The following updates have been made for Driver Framework: - **Continued migration away from DFv1 by removing numerous deprecated DDK functions and metadata IDs.** This includes the removal of `device_add_metadata`, `configure_auto_suspend`, and legacy metadata constants like `DEVICE_METADATA_WIFI_CONFIG`. - Changes: [fxr/1322125](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322125), [fxr/1319826](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319826), [fxr/1325656](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325656), [fxr/1273084](https://fuchsia-review.googlesource.com/c/fuchsia/+/1273084) - **Fixed an issue with driver node stability** , by ensuring driver nodes are properly quarantined when a driver host closes unexpectedly. - Changes: [fxr/1319550](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319550) - **Continued the migration of drivers to DFv2** , including `aml-pwm`, `aml-nna`, and `aml-meson-power`. The `i2c-channel` library was also updated with a DFv2-compatible version to support modern drivers. - Changes: [fxr/1313966](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313966), [fxr/1300644](https://fuchsia-review.googlesource.com/c/fuchsia/+/1300644), [fxr/1298045](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298045), [fxr/1272265](https://fuchsia-review.googlesource.com/c/fuchsia/+/1272265) - **Enabled driver components to implement a new `Suspendable` trait** to add optional suspend and resume lifecycle hooks. - Changes: [fxr/1307009](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307009) - **Streamlined the `ffx driver` plugin** by removing several deprecated subcommands, including `device`, `lspci`, `lsusb`, and `run-tool`, and adding a new `node` subcommand with improved ergonomics. - Changes: [fxr/1283898](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283898), [fxr/1283895](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283895), [fxr/1283897](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283897), [fxr/1288302](https://fuchsia-review.googlesource.com/c/fuchsia/+/1288302) - **Enhanced the Rust driver ecosystem** with a new `PlatformDevice` trait to improve testing with fake platform devices and a helper method for parsing driver configuration from start arguments and a `mock-mmio` crate to support mocking MMIO operations. - Changes: [fxr/1315256](https://fuchsia-review.googlesource.com/c/fuchsia/+/1315256), [fxr/1304086](https://fuchsia-review.googlesource.com/c/fuchsia/+/1304086) - **Enabled the driver host to detect and mitigate stalled threads** by proactively spawning new ones to ensure forward progress and aligning stall timer checks with the actual stall duration. - Changes: [fxr/1153333](https://fuchsia-review.googlesource.com/c/fuchsia/+/1153333), [fxr/1327293](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327293), [fxr/1309497](https://fuchsia-review.googlesource.com/c/fuchsia/+/1309497) - Bugs: [fxb/42085539](https://fxbug.dev/42085539) - **Fixed an issue in the platform bus driver where default IRQ modes were not configured correctly,** which could cause level-triggered interrupts to fail. - Changes: [fxr/1294323](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294323) - **Introduced a new core driver and FIDL library for interconnects.** This system manages and aggregates bandwidth requests from multiple clients to a single vendor driver, simplifying hardware interaction. - Changes: [fxr/1261365](https://fuchsia-review.googlesource.com/c/fuchsia/+/1261365), [fxr/1261364](https://fuchsia-review.googlesource.com/c/fuchsia/+/1261364) ## Feedback The following updates have been made for Feedback: - **Products can now exclude specific annotations** from snapshots via a configuration file. This reduces irrelevant data and avoids collection errors for unavailable annotations. - Changes: [fxr/1308013](https://fuchsia-review.googlesource.com/c/fuchsia/+/1308013), [fxr/1278189](https://fuchsia-review.googlesource.com/c/fuchsia/+/1278189), [fxr/1278188](https://fuchsia-review.googlesource.com/c/fuchsia/+/1278188), [fxr/1271298](https://fuchsia-review.googlesource.com/c/fuchsia/+/1271298) - **Added several new annotations** for improved diagnostics, including `device.total-suspended-time`, `system.last-reboot.total-suspended-time`, `system.last-reboot.runtime`, and `build.platform.utc-backstop`. - Changes: [fxr/1314095](https://fuchsia-review.googlesource.com/c/fuchsia/+/1314095), [fxr/1312424](https://fuchsia-review.googlesource.com/c/fuchsia/+/1312424), [fxr/1291982](https://fuchsia-review.googlesource.com/c/fuchsia/+/1291982), [fxr/1288290](https://fuchsia-review.googlesource.com/c/fuchsia/+/1288290) - **Enhanced the `crash_reporter` FIDL API** with a `weight` parameter, allowing a single crash report to represent multiple occurrences. - Changes: [fxr/1286646](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286646) - **Reverted the switch from JSON to FXT format** for fetching logs to resolve a performance issue. - Changes: [fxr/1275450](https://fuchsia-review.googlesource.com/c/fuchsia/+/1275450) - Bugs: [fxb/389545819](https://fxbug.dev/389545819) - **Improved diagnostics** by adding a timestamp to the system log recorder's shutdown message and logging when a report is temporarily stored due to insufficient cache space. - Changes: [fxr/1298604](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298604), [fxr/1277299](https://fuchsia-review.googlesource.com/c/fuchsia/+/1277299) - Bugs: [fxb/424240609](https://fxbug.dev/424240609), [fxb/360393048](https://fxbug.dev/360393048) - **Added a new configuration option** for `sysinfo_feedback_id`. - Changes: [fxr/1326965](https://fuchsia-review.googlesource.com/c/fuchsia/+/1326965) - Bugs: [fxb/427264599](https://fxbug.dev/427264599) - **Fixed an issue** where the incorrect reboot reason was reported to Cobalt. - Changes: [fxr/1322850](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322850) - Bugs: [fxb/424646831](https://fxbug.dev/424646831) - **Updated Feedback to check against current annotation counts** instead of legacy ones. - Changes: [fxr/1294865](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294865) - Bugs: [fxb/422177087](https://fxbug.dev/422177087), [fxb/373463212](https://fxbug.dev/373463212) - **Refactored redactor tests** to improve clarity and maintainability. - Changes: [fxr/1329428](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329428), [fxr/1328804](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328804) - Bugs: [fxb/383378552](https://fxbug.dev/383378552) ## FIDL The following updates have been made for FIDL: - **Optimized C++ FIDL code generation to improve build times** by moving generated function bodies out of headers and into a single source file. This change results in significant compilation speedups for C++ targets. - Changes: [fxr/1265227](https://fuchsia-review.googlesource.com/c/fuchsia/+/1265227) - Bugs: [fxb/361634289](https://fxbug.dev/361634289) - **Expanded the ABI compatibility checker** to run against all categories of SDK FIDL libraries, improving API stability guarantees. - Changes: [fxr/1261524](https://fuchsia-review.googlesource.com/c/fuchsia/+/1261524) ## Firmware The following updates have been made for Firmware: - **Implemented a standard mechanism for passing bootloader files** . Bootloader files, such as SSH keys, can now be passed to Fuchsia using the `/chosen/google/bootloader-files` devicetree node. A related fix ensures the scratch buffer for these files is properly aligned. - Changes: [fxr/1295284](https://fuchsia-review.googlesource.com/c/fuchsia/+/1295284), [fxr/1296945](https://fuchsia-review.googlesource.com/c/fuchsia/+/1296945) ## GPU and Graphics The following updates have been made for GPU and Graphics: - **Introduced a trusted path for GPU clients** , allowing trusted components like Scenic to request higher GPU scheduling priorities. This includes a new `fuchsia.vulkan.loader.TrustedService`, a trusted Magma FIDL protocol, and a new `magma_enumerate_devices` API to simplify device discovery. - Changes: [fxr/1287884](https://fuchsia-review.googlesource.com/c/fuchsia/+/1287884), [fxr/1284254](https://fuchsia-review.googlesource.com/c/fuchsia/+/1284254), [fxr/1283465](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283465), [fxr/1258630](https://fuchsia-review.googlesource.com/c/fuchsia/+/1258630), [fxr/1258629](https://fuchsia-review.googlesource.com/c/fuchsia/+/1258629) - **Added support for a `STRAIGHT_ALPHA` blend mode across the graphics stack** , allowing rendering of source pixels that have not been premultiplied with alpha. This includes a new `BlendMode2` in Flatland and updates to the Vulkan command buffer pipeline. - Changes: [fxr/1317804](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317804), [fxr/1326845](https://fuchsia-review.googlesource.com/c/fuchsia/+/1326845) - **Improved power management for GPU drivers** by migrating the `msd-arm-mali` driver to the ElementRunner protocol and creating a generic power manager in the Magma sys_driver for handling power state requests. - Changes: [fxr/1327299](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327299), [fxr/1303184](https://fuchsia-review.googlesource.com/c/fuchsia/+/1303184) - **Added support for an immediate presentation mode to the Vulkan swapchain** , which is useful for benchmarking by allowing clients to push frames as fast as they are rendered. - Changes: [fxr/1234054](https://fuchsia-review.googlesource.com/c/fuchsia/+/1234054) - **Updated the prebuilt Arm Mali ICDs** to incorporate various improvements, including support for the `VK_FORMAT_A2B10G10R10_UNORM_PACK32` format and other stability fixes. - Changes: [fxr/1324684](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324684), [fxr/1306844](https://fuchsia-review.googlesource.com/c/fuchsia/+/1306844), [fxr/1302284](https://fuchsia-review.googlesource.com/c/fuchsia/+/1302284), [fxr/1294804](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294804) - **Improved stability of the `msd-arm-mali` driver** by fixing a use-after-free bug and adding logic to proactively cancel client connections that repeatedly cause hardware errors. - Changes: [fxr/1291784](https://fuchsia-review.googlesource.com/c/fuchsia/+/1291784), [fxr/1284084](https://fuchsia-review.googlesource.com/c/fuchsia/+/1284084) - **Migrated the Magma driver test to use the standard driver test fixture** and `fdf::AddOwnedChild()`, making tests easier to write and read. - Changes: [fxr/1290424](https://fuchsia-review.googlesource.com/c/fuchsia/+/1290424) - Bugs: [fxb/328305994](https://fxbug.dev/328305994) ## I18n The following updates have been made for I18n: - **Updated the localization export for Fuchsia.** - Changes: [fxr/1273986](https://fuchsia-review.googlesource.com/c/fuchsia/+/1273986) ## IOT, Matter, and Thread The following updates have been made for IoT, Matter, and Thread: - **Landed lowpan ePSKc (Enhanced Pre-Shared Key for Commissioning) changed** , including updating OpenThread dependencies, adding Rust bindings, and integrating with the FeatureConfig service. Feature won't be enabled for F28. - Changes: [fxr/1330424](https://fuchsia-review.googlesource.com/c/fuchsia/+/1330424), [fxr/1266386](https://fuchsia-review.googlesource.com/c/fuchsia/+/1266386), [fxr/1266385](https://fuchsia-review.googlesource.com/c/fuchsia/+/1266385), [fxr/1324725](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324725), [fxr/1249121](https://fuchsia-review.googlesource.com/c/fuchsia/+/1249121), [fxr/1262724](https://fuchsia-review.googlesource.com/c/fuchsia/+/1262724) - **Updated the LoWPAN radio platform to handle OpenThread state changes** and enabled CSL (Coordinated Sampled Listening) transmitter functionality. - Changes: [fxr/1316006](https://fuchsia-review.googlesource.com/c/fuchsia/+/1316006), [fxr/1315585](https://fuchsia-review.googlesource.com/c/fuchsia/+/1315585) - Bugs: [fxb/424092850](https://fxbug.dev/424092850) - **Improved the reliability of the LoWPAN border agent** by implementing a retry mechanism for publishing its service upon failure. - Changes: [fxr/1255430](https://fuchsia-review.googlesource.com/c/fuchsia/+/1255430) - **Improved security by making fake directory files in Weave read-only** . - Changes: [fxr/1327164](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327164) - Bugs: [b/334892038](https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=334892038) ## Kernel The following updates have been made for Kernel: - **Enhanced CPU suspend and resume on ARM64.** Introduced support for CPU suspend by integrating with the PSCI `CPU_SUSPEND` interface, and adding suspend/resume hooks for the GICv3 interrupt controller and platform timers. To improve diagnostics, introduced a new API to report system wake sources. - **Introduced a more efficient compressed page storage system.** Replaced the `VmTriPageStorage` implementation with a new slot-based system that significantly reduces memory storage overhead from \~24% to \~5%. ## Netstack The following updates have been made for Netstack: - **Implemented Duplicate Address Detection (DAD) for IPv4** . The DHCP client now uses this feature to prevent IP conflicts for newly acquired addresses. - Changes: [fxr/1279264](https://fuchsia-review.googlesource.com/c/fuchsia/+/1279264), [fxr/1290304](https://fuchsia-review.googlesource.com/c/fuchsia/+/1290304) - **Introduced the `fuchsia.net.settings` FIDL API** to dynamically configure network settings, such as interface defaults and socket buffer sizes. - Changes: [fxr/1298364](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298364) - Bugs: [fxb/423607755](https://fxbug.dev/423607755) - **Enabled eBPF filter support for ingress and egress packets in Netstack3** , allowing for advanced packet inspection and manipulation. - Changes: [fxr/1291250](https://fuchsia-review.googlesource.com/c/fuchsia/+/1291250) - Bugs: [b/407809292](https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=407809292) - **Made the socket-proxy component critical** , causing the device to reboot upon termination to ensure socket availability and system stability. - Changes: [fxr/1329389](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329389) - **Added FIDL support for managing interface-local route tables** , enabling more granular routing control. - Changes: [fxr/1286598](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286598) - Bugs: [fxb/417225664](https://fxbug.dev/417225664) - **Implemented an orderly shutdown path in Netstack3** to ensure components terminate cleanly and reliably. - Changes: [fxr/1255691](https://fuchsia-review.googlesource.com/c/fuchsia/+/1255691) - **Introduced dynamic serializers for non-critical transport protocols in Netstack3** , significantly reducing compilation times and binary size. - Changes: [fxr/1324946](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324946) - **Enabled Netcfg support for json5 configuration files** , improving readability and maintainability with features like comments and trailing commas. - Changes: [fxr/1309304](https://fuchsia-review.googlesource.com/c/fuchsia/+/1309304) - **Prevented Netstack3 from forwarding IPv6 packets with link-local addresses** , conforming to RFC 4291. - Changes: [fxr/1318785](https://fuchsia-review.googlesource.com/c/fuchsia/+/1318785) - **Corrected a bug in TCP window size calculation** that could cause panics with large window sizes. - Changes: [fxr/1282284](https://fuchsia-review.googlesource.com/c/fuchsia/+/1282284) - **Fixed a race condition that could cause a panic** when rapidly stopping and starting Duplicate Address Detection. - Changes: [fxr/1306724](https://fuchsia-review.googlesource.com/c/fuchsia/+/1306724) - **Enhanced the Netlink subsystem to support unmanaged, interface-local route tables.** It now also aligns more closely with Linux behavior by no longer installing `/0` and `/32` subnet routes when an IP address is added. - Changes: [fxr/1329160](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329160), [fxr/1316944](https://fuchsia-review.googlesource.com/c/fuchsia/+/1316944) - Bugs: [fxb/427226662](https://fxbug.dev/427226662), [fxb/430063324](https://fxbug.dev/430063324) ## Platform Drivers The following updates have been made for Platform Drivers: - **Refactored the DWC3 USB driver significantly** to a single-threaded model to simplify locking and received fixes for endpoint state tracking. Added support for regulator binding and voting on interconnect resources. - Changes: [fxr/1317467](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317467), [fxr/1320227](https://fuchsia-review.googlesource.com/c/fuchsia/+/1320227), [fxr/1303846](https://fuchsia-review.googlesource.com/c/fuchsia/+/1303846), [fxr/1291688](https://fuchsia-review.googlesource.com/c/fuchsia/+/1291688) - **Introduced a new core interconnect driver** to manage and aggregate bus bandwidth requests. Also improved Devicetree visitors for clocks and interrupts for more robust hardware discovery and to support wake-capable interrupts. - Changes: [fxr/1261365](https://fuchsia-review.googlesource.com/c/fuchsia/+/1261365), [fxr/1319284](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319284), [fxr/1277163](https://fuchsia-review.googlesource.com/c/fuchsia/+/1277163) ## Power Management The following updates have been made for Power Management: - **Migrated multiple power drivers and components to use the `ElementRunner` protocol** , which inverts the client/server relationship with Power Broker for more straightforward power level management. This includes UFS, msd-arm-mali, aml-sdmmc, sdmmc, and timekeeper components. - Changes: [fxr/1324984](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324984), [fxr/1327299](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327299), [fxr/1317984](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317984) - **Enhanced power management and suspend capabilities** , with a new API to report system wake sources, support for deeper power-saving states via PSCI, and finer-grained CPU power control. For improved diagnostics, the system activity governor now tracks cumulative suspend time. - Changes: [fxr/1324709](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324709), [fxr/1324844](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324844), [fxr/1313116](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313116), [fxr/1320246](https://fuchsia-review.googlesource.com/c/fuchsia/+/1320246) - **Improved the SDMMC driver for better power management and suspend/resume handling** . It now sends power-off notifications, correctly probes eMMC devices and resets bus settings on resume, and the `aml-sdmmc` driver was migrated to the `ElementRunner` power management protocol. - Changes: [fxr/1324404](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324404), [fxr/1317984](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317984), [fxr/1307964](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307964) - **Refactored the driver power management library for wake leases significantly** for improved clarity, correctness, and ease of use. This included renaming classes, clarifying responsibilities between manual and timeout-based leases, and fixing bugs related to lease invalidation across suspend/resume cycles. - Changes: [fxr/1264034](https://fuchsia-review.googlesource.com/c/fuchsia/+/1264034), [fxr/1274644](https://fuchsia-review.googlesource.com/c/fuchsia/+/1274644), [fxr/1260264](https://fuchsia-review.googlesource.com/c/fuchsia/+/1260264) - **Enhanced power management observability and diagnostics** by adding more data to Inspect. This includes historical temperature sensor readings, the source of Starnix wake locks and active epoll counts, and boot/monotonic clock skew for FSH drivers. - Changes: [fxr/1265232](https://fuchsia-review.googlesource.com/c/fuchsia/+/1265232), [fxr/1288408](https://fuchsia-review.googlesource.com/c/fuchsia/+/1288408), [fxr/1325253](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325253) - **Introduced a new `poweroff_for_shutdown` configuration** to allow Power Manager to power off the device during the shutdown process, instead of rebooting. - Changes: [fxr/1270326](https://fuchsia-review.googlesource.com/c/fuchsia/+/1270326) - **Made storage power management depend on the `fuchsia::suspending_token`** to prevent the device from entering a non-suspendable state. - Changes: [fxr/1307644](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307644) ## Rust The following updates have been made for Rust: - **Made major enhancements to `fuchsia-async`** , including a new builder pattern for creating executors, support for cooperative cancellation in `Scope`, and an `OnInterrupt` stream for handling hardware interrupts. Renamed task cancellation methods from `cancel()` to `abort()` to align with the new cancellation semantics. - Changes: [fxr/1333172](https://fuchsia-review.googlesource.com/c/fuchsia/+/1333172), [fxr/1319645](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319645), [fxr/1252944](https://fuchsia-review.googlesource.com/c/fuchsia/+/1252944), [fxr/1266484](https://fuchsia-review.googlesource.com/c/fuchsia/+/1266484) - Bugs: [fxb/379944929](https://fxbug.dev/379944929) - **Enhanced tooling** : `fx clippy` now accepts glob patterns and additional flags, and host-side Rust tests produce symbolized backtraces on failure for easier debugging. - Changes: [fxr/1324949](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324949), [fxr/1321597](https://fuchsia-review.googlesource.com/c/fuchsia/+/1321597), [fxr/1290564](https://fuchsia-review.googlesource.com/c/fuchsia/+/1290564) ## Software Delivery The following updates have been made for Software Delivery: - **Enabled a new "packageless" Over-the-Air (OTA) update flow.** The system updater can now fetch a manifest from an HTTP/S URL to download, stage, and commit an update, removing the need for a traditional update package. - Changes: [fxr/1327407](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327407), [fxr/1325250](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325250), [fxr/1325669](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325669), [fxr/1319784](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319784), [fxr/1314424](https://fuchsia-review.googlesource.com/c/fuchsia/+/1314424) - Bugs: [fxb/432093924](https://fxbug.dev/432093924), [fxb/429271527](https://fxbug.dev/429271527), [fxb/429270435](https://fxbug.dev/429270435) - **Added the ABI revision to the package manifest** and `assembled_system.json` to make it easier to identify which ABI revisions are used by which packages. - Changes: [fxr/1328584](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328584) - **Optimized `pkg-cache` memory usage by over 690 KiB.** This was achieved by switching to more memory-efficient internal data structures and avoiding unnecessary data copies. - Changes: [fxr/1313808](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313808), [fxr/1312425](https://fuchsia-review.googlesource.com/c/fuchsia/+/1312425) - **Introduced new APIs for more direct control over blobs.** The `pkg-cache` and `pkg-resolver` components now have new APIs (`RetainedBlobs`, `WriteBlobs`, `FetchBlob`) for more direct control over blob fetching and garbage collection. - Changes: [fxr/1311006](https://fuchsia-review.googlesource.com/c/fuchsia/+/1311006), [fxr/1297504](https://fuchsia-review.googlesource.com/c/fuchsia/+/1297504) - Bugs: [fxb/423063230](https://fxbug.dev/423063230) ## Starnix The following updates have been made for Starnix: - **Introduced throttling for crash reporting** to reduce system load from crash-looping processes. If a process crashes more than 8 times in 8 minutes, subsequent reports will be throttled. - Changes: [fxr/1286224](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286224) - **Added support for the `io_cancel` syscall** , enabling asynchronous I/O cancellation. - Changes: [fxr/1322639](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322639) - **Enforced the `noexec` mount option for `get-memory` and `mmap`** on a `FileObject`. - Changes: [fxr/1319384](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319384) - **Implemented the `CAP_DAC_READ_SEARCH` capability for FsNode access checks** - Changes: [fxr/1329465](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329465) - **Strengthened SELinux enforcement** by implementing permission checks for numerous operations, including signal inheritance (`siginh`), filesystem mounting (`mounton`), and various socket and binder operations. - Changes: [fxr/1325222](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325222), [fxr/1319305](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319305) - **Corrected permission checks for syslog-related operations (`/dev/kmsg`, `/proc/kmsg`, `syslog(2)`)** to align with modern Linux behavior. - Changes: [fxr/1304324](https://fuchsia-review.googlesource.com/c/fuchsia/+/1304324) - **Enabled VMO optimization for private anonymous memory** . Also fixed `smaps` generation to support this feature, improving memory efficiency. - Changes: [fxr/1275449](https://fuchsia-review.googlesource.com/c/fuchsia/+/1275449) - **Improved performance and memory usage** through several changes, including enabling Link-Time Optimization (LTO), reducing the size of the internal `Mapping` struct, and adding a `clean_stack` function to de-commit unused stack pages. - Changes: [fxr/1321047](https://fuchsia-review.googlesource.com/c/fuchsia/+/1321047), [fxr/1209409](https://fuchsia-review.googlesource.com/c/fuchsia/+/1209409), [fxr/1326985](https://fuchsia-review.googlesource.com/c/fuchsia/+/1326985) - **Updated the `devpts` filesystem to support multiple independent instances** , each with its own set of pseudo-terminals, using the `newinstance` mount option. - Changes: [fxr/1320144](https://fuchsia-review.googlesource.com/c/fuchsia/+/1320144) - **Aligned the system uptime reported in `/proc/uptime` with Linux behavior** by basing it on the boot timeline, which includes time spent in suspend. - Changes: [fxr/1263064](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263064) - **Enhanced eBPF support with several new features** , including 32-bit memory operations, UDP send/recv hooks, socket option hooks, and several new helper functions. - Changes: [fxr/1333048](https://fuchsia-review.googlesource.com/c/fuchsia/+/1333048), [fxr/1325673](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325673), [fxr/1314099](https://fuchsia-review.googlesource.com/c/fuchsia/+/1314099) - **Fixed an uncommon issue with binder dead replies** where they could be processed out of order, causing the wrong transaction to be popped from the stack. - Changes: [fxr/1273164](https://fuchsia-review.googlesource.com/c/fuchsia/+/1273164) - **Optimized Remote Binder communication** by gathering all writes to be returned in a single `ioctl` call, reducing FIDL traffic. - Changes: [fxr/1309944](https://fuchsia-review.googlesource.com/c/fuchsia/+/1309944) - **Updated task priority and niceness handling to better align with Linux behavior** , including proper `RLIMIT_RTPRIO` enforcement, which now defaults to zero. - Changes: [fxr/1286324](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286324) - **Added new modules for `fastrpc` and `dmaheap`** to provide cross-processor RPC functionality to Starnix applications. - Changes: [fxr/1249785](https://fuchsia-review.googlesource.com/c/fuchsia/+/1249785) ## Storage The following updates have been made for Storage: - **`storage-host` improvements** . This effort includes checking the data volume with fsck before mounting, adding support for shredding encrypted volumes during factory reset, and moving core storage drivers into assembly bundles to reduce image size. - Changes: [fxr/1299708](https://fuchsia-review.googlesource.com/c/fuchsia/+/1299708), [fxr/1303586](https://fuchsia-review.googlesource.com/c/fuchsia/+/1303586), [fxr/1303850](https://fuchsia-review.googlesource.com/c/fuchsia/+/1303850), [fxr/1302604](https://fuchsia-review.googlesource.com/c/fuchsia/+/1302604) - Bugs: [fxb/405398325](https://fxbug.dev/405398325), [fxb/424554759](https://fxbug.dev/424554759), [fxb/425682108](https://fxbug.dev/425682108) - **Enabled Fshost to support matching and routing block devices using semantic labels.** This allows specific partitions to be statically routed to components, replacing the need for direct `/dev/class/block` access. - Changes: [fxr/1322865](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322865), [fxr/1298085](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298085) - Bugs: [fxb/417772975](https://fxbug.dev/417772975) - **Made several performance and reliability improvements to fxfs** , including dynamic read-ahead sizing based on memory pressure, more efficient flushing logic, and ensuring I/O barriers are issued correctly. - Changes: [fxr/1304282](https://fuchsia-review.googlesource.com/c/fuchsia/+/1304282), [fxr/1275678](https://fuchsia-review.googlesource.com/c/fuchsia/+/1275678), [fxr/1264814](https://fuchsia-review.googlesource.com/c/fuchsia/+/1264814), [fxr/1265324](https://fuchsia-review.googlesource.com/c/fuchsia/+/1265324) - **Added new capabilities to fxfs** , including support for overwriting existing blobs via the `BlobCreator` protocol and initial support for streaming a blob volume to disk. - Changes: [fxr/1284252](https://fuchsia-review.googlesource.com/c/fuchsia/+/1284252), [fxr/1288725](https://fuchsia-review.googlesource.com/c/fuchsia/+/1288725), [fxr/1263965](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263965) - Bugs: [fxb/397501864](https://fxbug.dev/397501864) - **Migrated the C++ VFS and storage conformance tests to the modern `fuchsia.io` (io2) API** , deprecating legacy io1 methods. - Changes: [fxr/1327104](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327104), [fxr/1281705](https://fuchsia-review.googlesource.com/c/fuchsia/+/1281705), [fxr/1277304](https://fuchsia-review.googlesource.com/c/fuchsia/+/1277304) - Bugs: [fxb/324080864](https://fxbug.dev/324080864), [fxb/416093827](https://fxbug.dev/416093827) - **Improved F2FS** with initial support for running on FVM, an image-based compatibility test with Linux, and an increase in the default minimum filesystem size. - Changes: [fxr/1313265](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313265), [fxr/1276524](https://fuchsia-review.googlesource.com/c/fuchsia/+/1276524), [fxr/1263124](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263124) - **Enhanced the block layer and associated drivers.** This includes re-enabling passthrough I/O, adding support for I/O barriers in the block protocol and ramdisk driver, and migrating UFS power management to `ElementRunner`. - Changes: [fxr/1324984](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324984), [fxr/1281444](https://fuchsia-review.googlesource.com/c/fuchsia/+/1281444), [fxr/1264004](https://fuchsia-review.googlesource.com/c/fuchsia/+/1264004), [fxr/1263624](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263624) - Bugs: [fxb/402515764](https://fxbug.dev/402515764) - **Added basic support for the `64bit` flag to the read-only ext4 driver** , enabling it to mount filesystems with larger block group descriptors. - Changes: [fxr/1298007](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298007) - Bugs: [fxb/42073143](https://fxbug.dev/42073143) ## Testing The following updates have been made for Testing: - **Made numerous enhancements to the Honeydew end-to-end testing framework** , including a `UsbPowerHub` device for controlling USB power, a renamed `powerserver` library for power measurement, new audio and scenic affordances, improved session cleanup mechanisms, and re-enabling screenshot assertions after fixing sources of flakiness. - Changes: [fxr/1325891](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325891), [fxr/1323554](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323554), [fxr/1264624](https://fuchsia-review.googlesource.com/c/fuchsia/+/1264624), [fxr/1264205](https://fuchsia-review.googlesource.com/c/fuchsia/+/1264205), [fxr/1236208](https://fuchsia-review.googlesource.com/c/fuchsia/+/1236208), [fxr/1266024](https://fuchsia-review.googlesource.com/c/fuchsia/+/1266024) - **Made multiple improvements to debugger end-to-end tests to enhance stability** , including better command-output synchronization, support for out-of-order output matching, additional logging, and the temporary disabling of DebugAgent integration to reduce log spam. - Changes: [fxr/1331424](https://fuchsia-review.googlesource.com/c/fuchsia/+/1331424), [fxr/1323324](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323324), [fxr/1322324](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322324), [fxr/1287704](https://fuchsia-review.googlesource.com/c/fuchsia/+/1287704), [fxr/1286724](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286724), [fxr/1285664](https://fuchsia-review.googlesource.com/c/fuchsia/+/1285664) - **Added a new Lacewing end-to-end test** to verify that a device reboots with the expected reason when instructed to do so. - Changes: [fxr/1319705](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319705) - **Added new IPC benchmarks** to compare different methods of transmitting large messages, including a specific benchmark for `BatchStream`. - Changes: [fxr/1317707](https://fuchsia-review.googlesource.com/c/fuchsia/+/1317707), [fxr/1298804](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298804) - Bugs: [fxb/424251793](https://fxbug.dev/424251793) ## Timekeeping The following updates have been made for Timekeeping: - **Introduced wake alarm emulation** to provide a consistent `fuchsia.time.alarms` API on platforms lacking hardware support. - Changes: [fxr/1278651](https://fuchsia-review.googlesource.com/c/fuchsia/+/1278651), [fxr/1278650](https://fuchsia-review.googlesource.com/c/fuchsia/+/1278650) - **Added the `WakeAlarms.Set()` API** , which uses a listener pattern as an alternative to `SetAndWait`, to better support escrowable components scheduling wakeups. - Changes: [fxr/1312970](https://fuchsia-review.googlesource.com/c/fuchsia/+/1312970), [fxr/1297351](https://fuchsia-review.googlesource.com/c/fuchsia/+/1297351) - Bugs: [fxb/424009669](https://fxbug.dev/424009669) - **Updated Timekeeper to use the network reachability service** to avoid attempting to sync time when there is no network connectivity, reducing power consumption. - Changes: [fxr/1263009](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263009), [fxr/1274168](https://fuchsia-review.googlesource.com/c/fuchsia/+/1274168) - **Updated the `fuchsia.time.alarms.Wake` API** by modifying the `SetAndWait` signature to improve wake lease management and removing the unused `GetProperties` and `CancelSync` methods. - Changes: [fxr/1286527](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286527), [fxr/1289365](https://fuchsia-review.googlesource.com/c/fuchsia/+/1289365) - Bugs: [fxb/419860677](https://fxbug.dev/419860677) - **Improved the robustness of time and alarm services** by fixing a potential timer comparison overflow, ensuring Timekeeper waits for `hrtimer` enumeration, and preventing startup failures from duplicate clock IDs. - Changes: [fxr/1286769](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286769), [fxr/1220286](https://fuchsia-review.googlesource.com/c/fuchsia/+/1220286), [fxr/1289668](https://fuchsia-review.googlesource.com/c/fuchsia/+/1289668) - **Enabled sourcing the boot time from a powered peripheral** , allowing time to persist across reboots. - Changes: [fxr/1289542](https://fuchsia-review.googlesource.com/c/fuchsia/+/1289542) - **Migrated Timekeeper to the new `ElementRunner` protocol** for improved power management integration. - Changes: [fxr/1241004](https://fuchsia-review.googlesource.com/c/fuchsia/+/1241004) ## Toolchain The following updates have been made for Toolchain: - **Updated Clang and Rust toolchains** to their latest versions. - Changes: [fxr/1327414](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327414) - Bugs: [fxb/432745920](https://fxbug.dev/432745920) ## Tools The following updates have been made for Tools: ### ffx The following updates have been made for ffx: - **Enabled a new direct connection mode with the `-d` or `--direct` flag** , allowing many commands to connect to a target without a daemon. This includes improved behavior for `ffx target list` and proper error handling for daemon-specific commands. - Changes: [fxr/1322633](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322633), [fxr/1331306](https://fuchsia-review.googlesource.com/c/fuchsia/+/1331306), [fxr/1330860](https://fuchsia-review.googlesource.com/c/fuchsia/+/1330860) - **Added a new `ffx wm` tool for managing windows** , with subcommands to `list`, `focus`, `cycle`, and `set_order` windows. - Changes: [fxr/1115713](https://fuchsia-review.googlesource.com/c/fuchsia/+/1115713) - **Updated the `ffx target flash` command to display a progress indicator** , and added a new `--upload` option to `ffx target snapshot` to upload the snapshot to a GCS bucket. - Changes: [fxr/1311604](https://fuchsia-review.googlesource.com/c/fuchsia/+/1311604), [fxr/1303306](https://fuchsia-review.googlesource.com/c/fuchsia/+/1303306) - **Removed legacy methods for managing default targets** , deprecating the `ffx target default {set, unset}` commands and the `fx -d` flag. - Changes: [fxr/1326187](https://fuchsia-review.googlesource.com/c/fuchsia/+/1326187) - **Fixed several stability issues** , including a potential deadlock with concurrent SSH connections and a timeout when waiting for a remote control proxy. - Changes: [fxr/1322632](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322632), [fxr/1325246](https://fuchsia-review.googlesource.com/c/fuchsia/+/1325246) - **Removed the `ffx agis` command.** - Changes: [fxr/1314044](https://fuchsia-review.googlesource.com/c/fuchsia/+/1314044) ### fx The following updates have been made for fx: - **Enhanced the `set-main-pb` tool for managing product bundles** with a text-based user interface (TUI) for easier selection and now sorts the bundle list alphabetically. - Changes: [fxr/1294864](https://fuchsia-review.googlesource.com/c/fuchsia/+/1294864), [fxr/1332954](https://fuchsia-review.googlesource.com/c/fuchsia/+/1332954) - **Enabled `fx` to provide helpful suggestions for mistyped commands.** - Changes: [fxr/1271284](https://fuchsia-review.googlesource.com/c/fuchsia/+/1271284) - Bugs: [fxb/402762037](https://fxbug.dev/402762037) - **Added new command-line flags** , including `--quiet` for `fx build`, a compression level flag (`-c`) for `fx create-pb-zip`, and an option to skip SSH key patching in `fx qemu`. - Changes: [fxr/1305164](https://fuchsia-review.googlesource.com/c/fuchsia/+/1305164), [fxr/1323549](https://fuchsia-review.googlesource.com/c/fuchsia/+/1323549), [fxr/1321986](https://fuchsia-review.googlesource.com/c/fuchsia/+/1321986) - **Made the `fx` environment more reliable** , using a prebuilt version of `jq` and fixing authentication issues with `fx rbe auth`. - Changes: [fxr/1307764](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307764), [fxr/1322424](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322424) - **Removed the deprecated `--with-base` flag for `fx create`.** - Changes: [fxr/1316251](https://fuchsia-review.googlesource.com/c/fuchsia/+/1316251) - **Improved the developer workflow with automatic port forwarding in `fx serve`** and a shared library to deduplicate URL fetching logic across packaging tools. - Changes: [fxr/1272397](https://fuchsia-review.googlesource.com/c/fuchsia/+/1272397), [fxr/1322724](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322724) - Bugs: [b/430504024](https://bugs.fuchsia.dev/p/fuchsia/issues/detail?id=430504024) ### zxdb The following updates have been made for zxdb: - **Improved the zxdb debugger** with PrettyType support for `std::span` and a fix for the `display` command to respect the configured integer format. - Changes: [fxr/1312304](https://fuchsia-review.googlesource.com/c/fuchsia/+/1312304), [fxr/1312344](https://fuchsia-review.googlesource.com/c/fuchsia/+/1312344) - Bugs: [fxb/427471530](https://fxbug.dev/427471530) ## Tracing The following updates have been made for Tracing: - **Optimized the `ktrace_provider` significantly for streaming mode** , featuring reduced latency, more consistent polling, faster startup, and more efficient kernel buffer reads to improve trace data reliability. - Changes: [fxr/1327303](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327303), [fxr/1327302](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327302), [fxr/1318986](https://fuchsia-review.googlesource.com/c/fuchsia/+/1318986), [fxr/1264024](https://fuchsia-review.googlesource.com/c/fuchsia/+/1264024) - **Enabled on-device buffering for streaming traces via `ffx trace`** , allowing data transfer at the end of the session to reduce CPU overhead during collection. - Changes: [fxr/1260408](https://fuchsia-review.googlesource.com/c/fuchsia/+/1260408), [fxr/1260407](https://fuchsia-review.googlesource.com/c/fuchsia/+/1260407) - Bugs: [fxb/413106095](https://fxbug.dev/413106095) - **Added a new blob argument type to the FXT trace format** for embedding opaque data. A new `fxtdump` host tool is also available for inspecting and debugging FXT files. - Changes: [fxr/1277747](https://fuchsia-review.googlesource.com/c/fuchsia/+/1277747), [fxr/1313809](https://fuchsia-review.googlesource.com/c/fuchsia/+/1313809) - Bugs: [fxb/433532694](https://fxbug.dev/433532694) - **Optimized the `trace2json` tool to use significantly less memory** and run up to 40% faster by adopting a two-pass reading approach and a buffered output stream. - Changes: [fxr/1328611](https://fuchsia-review.googlesource.com/c/fuchsia/+/1328611), [fxr/1319010](https://fuchsia-review.googlesource.com/c/fuchsia/+/1319010) - **Improved Rust tracing performance** by enabling argument interning to reduce trace size and by optimizing lock usage to decrease write times for ATrace events. - Changes: [fxr/1314092](https://fuchsia-review.googlesource.com/c/fuchsia/+/1314092), [fxr/1304684](https://fuchsia-review.googlesource.com/c/fuchsia/+/1304684) - **Updated the trace engine to use a new, more correct, and testable rolling buffer implementation** to fix race conditions. - Changes: [fxr/1307311](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307311), [fxr/1307310](https://fuchsia-review.googlesource.com/c/fuchsia/+/1307310) - Bugs: [fxb/303666620](https://fxbug.dev/303666620) ## UI The following updates have been made for UI: - **Made significant improvements to Scenic's performance and diagnostics.** This includes new tracing tools (`scenic_session_present`, `run_graphics_metrics`), better diagnostics for direct-to-display failures, fixes to frame prediction logic, and performance improvements from increasing Escher's cleanup interval. - Changes: [fxr/1272434](https://fuchsia-review.googlesource.com/c/fuchsia/+/1272434), [fxr/1272947](https://fuchsia-review.googlesource.com/c/fuchsia/+/1272947), [fxr/1272386](https://fuchsia-review.googlesource.com/c/fuchsia/+/1272386), [fxr/1270624](https://fuchsia-review.googlesource.com/c/fuchsia/+/1270624), [fxr/1286309](https://fuchsia-review.googlesource.com/c/fuchsia/+/1286309), [fxr/1260464](https://fuchsia-review.googlesource.com/c/fuchsia/+/1260464) - **Added support for new Vulkan image formats.** Scenic now supports `A2B10G10R10UnormPack32` and `R8Unorm`. - Changes: [fxr/1298006](https://fuchsia-review.googlesource.com/c/fuchsia/+/1298006) - **Added a frame counter overlay to Flatland for visual debugging** . It can be enabled through component configuration or by setting the `visual_debugging_level`. - Changes: [fxr/1295168](https://fuchsia-review.googlesource.com/c/fuchsia/+/1295168), [fxr/1321784](https://fuchsia-review.googlesource.com/c/fuchsia/+/1321784) - Bugs: [fxb/423066970](https://fxbug.dev/423066970) - **Increased the maximum number of hardware display layers supported by Scenic** from one to the hardware-supported limit, as previous software limitations have been resolved. - Changes: [fxr/1275807](https://fuchsia-review.googlesource.com/c/fuchsia/+/1275807) - Bugs: [fxb/42078234](https://fxbug.dev/42078234), [fxb/370839049](https://fxbug.dev/370839049) - **Fixed deadlocks in the Escher external semaphore test** by signaling from a background thread, improving test reliability on Lavapipe and Goldfish. - Changes: [fxr/1330684](https://fuchsia-review.googlesource.com/c/fuchsia/+/1330684) ## Video The following updates have been made for Video: - **Removed dependency on deprecated `ulib/syslog`.** - Changes: [fxr/1329004](https://fuchsia-review.googlesource.com/c/fuchsia/+/1329004) ## WLAN and Connectivity The following updates have been made for WLAN and Connectivity: - **Made major improvements to the WLAN PHY reset and recovery mechanism** , which now allows `wlancfg` to trigger a reset when the system is in a degraded state, improving overall stability. - Changes: [fxr/987896](https://fuchsia-review.googlesource.com/c/fuchsia/+/987896), [fxr/1283689](https://fuchsia-review.googlesource.com/c/fuchsia/+/1283689) - **Introduced support for powering the WLAN PHY down and up.** This includes new FIDL methods for power management and ensuring the driver is correctly re-initialized after a power-up. - Changes: [fxr/1263044](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263044) - **Enabled `netcfg` to report network status to `socket-proxy`** , including default network changes and DNS configuration, via the new `fuchsia.net.policy.properties` FIDL API. - Changes: [fxr/1306906](https://fuchsia-review.googlesource.com/c/fuchsia/+/1306906), [fxr/1165212](https://fuchsia-review.googlesource.com/c/fuchsia/+/1165212), [fxr/1211044](https://fuchsia-review.googlesource.com/c/fuchsia/+/1211044) - Bugs: [fxb/385368910](https://fxbug.dev/385368910) - **Improved connection stability for Broadcom Wi-Fi drivers** by using the correct channel bandwidth to reduce `NO_NETWORK` failures and using more effective deauthentication commands to clear connection state after a failure. - Changes: [fxr/1327144](https://fuchsia-review.googlesource.com/c/fuchsia/+/1327144), [fxr/1324464](https://fuchsia-review.googlesource.com/c/fuchsia/+/1324464), [fxr/1322426](https://fuchsia-review.googlesource.com/c/fuchsia/+/1322426) - **Fixed a bug preventing Wi-Fi scanning from working in busy environments.** Scan results are now sent in a VMO to avoid hitting FIDL message size limits. - Changes: [fxr/1305664](https://fuchsia-review.googlesource.com/c/fuchsia/+/1305664) - **Made WLAN roaming more reliable** by filtering potential roam targets to ensure compatible security protection and by fixing a bug that prevented roaming to WPA1/WPA2 mixed-mode networks. - Changes: [fxr/1295065](https://fuchsia-review.googlesource.com/c/fuchsia/+/1295065), [fxr/1281584](https://fuchsia-review.googlesource.com/c/fuchsia/+/1281584) - **Enhanced WLAN telemetry significantly** to log more detailed metrics for disconnect reasons, scan performance, connection duration, RX/TX statistics, and recovery events. - Changes: [fxr/1276964](https://fuchsia-review.googlesource.com/c/fuchsia/+/1276964), [fxr/1266799](https://fuchsia-review.googlesource.com/c/fuchsia/+/1266799), [fxr/1263244](https://fuchsia-review.googlesource.com/c/fuchsia/+/1263244)