--- title: Kernel 6.4: More work on MediaTek, Rockchip, and power... description: Linux kernel 6.4 has been released, bringing features like Intel LAM support, user events for tracing, AMD P-State Guided Autonomous Mode, and a Rust pin-init... canonical: https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Kernel 6.4: More work on MediaTek, Rockchip, and power supply | daily.dev og:description: Linux kernel 6.4 has been released, bringing features like Intel LAM support, user events for tracing, AMD P-State Guided Autonomous Mode, and a Rust pin-init... og:url: https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m og:image: https://api.daily.dev/og/posts/loZ5wji8m.png og:image:alt: Kernel 6.4: More work on MediaTek, Rockchip, and power supply og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Kernel 6.4: More work on MediaTek, Rockchip, and power supply **[Collabora Blog](https://daily.dev/sources/collabora)** · 4 min read · 0 upvotes · 0 comments ## Summary Linux kernel 6.4 has been released, bringing features like Intel LAM support, user events for tracing, AMD P-State Guided Autonomous Mode, and a Rust pin-init API. SELinux can no longer be disabled at runtime. Collabora's engineering team contributed significantly: AngeloGioacchino Del Regno reviewed hundreds of MediaTek patches; Cristian Ciocaltea added ES8316 audio support and RK3588 I2S/PWM/voltage regulator work for Radxa Rock 5B; Sebastian Reichel added RK3588 thermal support and maintained the power-supply subsystem, including merging an AMD fix for desktops incorrectly reporting battery power — a bug that caused GPU performance degradation. Other contributions include codec cleanups, HEVC/VP9 10-bit format fixes, and DRM deadlock locking policy changes. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What was fixed in Linux kernel 6.4 for desktops incorrectly reporting battery power? Kernel 6.4 merged an AMD-contributed fix for systems without battery or charger devices — such as desktops — incorrectly reporting they are running on battery power. The power-supply core normally avoids this by reporting AC power when no battery devices exist, but it incorrectly counted device-scope devices like wireless mice. AMD discovered the bug via recent GPUs registering a power-supply charger for USB-C ports, causing incorrect dynamic power management and reduced GPU performance. _Developers tracking Linux power management regressions find kernel release breakdowns like this on daily.dev._ ### What Rockchip RK3588 support was added in Linux kernel 6.4? Kernel 6.4 added several RK3588 improvements: ES8316 codec-based analog audio for Radxa Rock 5B, I2S controller enablement, PWM-controlled heat sink fan support, and an extended Fairchild FAN53555 driver to control RK860X voltage regulators powering the ARM Cortex-A76 cores and NPU. Thermal support for the RK3588(s) SoC series and watchdog support were also added. _Engineers bringing up RK3588 boards track upstream kernel support milestones on daily.dev._ ## Similar posts on daily.dev - [Kernel 7.2: RK3588 media, smarter GPU memory, and Rust foundations](https://daily.dev/posts/kernel-7-2-rk3588-media-smarter-gpu-memory-and-rust-foundations-vrpih8voj) · Collabora Blog · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#rust](https://daily.dev/tags/rust) [View this post on daily.dev](https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Kernel 6.4: More work on MediaTek, Rockchip, and power supply","url":"https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m"},"datePublished":"2026-08-11T08:56:26.080Z","dateModified":"2026-08-11T09:10:19.172Z","description":"Linux kernel 6.4 has been released, bringing features like Intel LAM support, user events for tracing, AMD P-State Guided Autonomous Mode, and a Rust pin-init...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f398727453465fa8b7d0594efcee618f?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/f398727453465fa8b7d0594efcee618f?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Collabora Blog","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Collabora Blog","logo":"https://media.daily.dev/image/upload/s--ZGZ0FjqS--/f_auto,q_auto/v1786438306/logos/collabora?_a=BAMAMicg0","url":"https://daily.dev/sources/collabora"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"linux,rust","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Collabora Blog","item":"https://daily.dev/sources/collabora"},{"@type":"ListItem","position":3,"name":"Kernel 6.4: More work on MediaTek, Rockchip, and power supply"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/kernel-6-4-more-work-on-mediatek-rockchip-and-power-supply-loz5wji8m#faq","mainEntity":[{"@type":"Question","name":"What was fixed in Linux kernel 6.4 for desktops incorrectly reporting battery power?","acceptedAnswer":{"@type":"Answer","text":"Kernel 6.4 merged an AMD-contributed fix for systems without battery or charger devices — such as desktops — incorrectly reporting they are running on battery power. The power-supply core normally avoids this by reporting AC power when no battery devices exist, but it incorrectly counted device-scope devices like wireless mice. AMD discovered the bug via recent GPUs registering a power-supply charger for USB-C ports, causing incorrect dynamic power management and reduced GPU performance. Developers tracking Linux power management regressions find kernel release breakdowns like this on daily.dev."}},{"@type":"Question","name":"What Rockchip RK3588 support was added in Linux kernel 6.4?","acceptedAnswer":{"@type":"Answer","text":"Kernel 6.4 added several RK3588 improvements: ES8316 codec-based analog audio for Radxa Rock 5B, I2S controller enablement, PWM-controlled heat sink fan support, and an extended Fairchild FAN53555 driver to control RK860X voltage regulators powering the ARM Cortex-A76 cores and NPU. Thermal support for the RK3588(s) SoC series and watchdog support were also added. Engineers bringing up RK3588 boards track upstream kernel support milestones on daily.dev."}}]} ```