apport information ** Attachment added: "ProcCpuinfo.txt" https://bugs.launchpad.net/bugs/2112165/+attachment/5881766/+files/ProcCpuinfo.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2112165 Title: Brightness control not working on ASUS ROG Zephyrus G16 GU605MI (no usable backlight interface) Status in linux package in Ubuntu: Incomplete Bug description: I’m running Ubuntu 24.04 with kernel 6.11 on an ASUS ROG Zephyrus G16 GU605MI laptop. Screen brightness control does not work. Neither /sys/class/backlight interfaces nor software tools like xrandr have any effect. The device uses hybrid graphics (Intel + NVIDIA), and all common kernel boot parameters have been tested without success. Model: ASUS ROG Zephyrus G16 GU605MI Kernel: 6.11.0-26-generic Display: Internal eDP panel (detected as eDP-1) GPU: Intel iGPU + NVIDIA RTX 4060 Laptop GPU /sys/class/backlight: Empty or only intel_backlight, which does nothing Tried kernel parameters: acpi_backlight=video acpi_backlight=native acpi_backlight=vendor acpi_backlight=none acpi_osi=Linux Expected behavior: Brightness should be adjustable using brightnessctl, /sys/class/backlight, or xrandr. Actual behavior: /sys/class/backlight is missing or ineffective xrandr --brightness has no effect brightnessctl runs but does not change brightness No visible EC or alternative brightness path is exposed --- ProblemType: Bug ApportVersion: 2.28.1-0ubuntu3.6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: usuario 2669 F.... wireplumber /dev/snd/controlC0: usuario 2669 F.... wireplumber /dev/snd/seq: usuario 2665 F.... pipewire CRDA: N/A CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 24.04 InstallationDate: Installed on 2025-05-06 (27 days ago) InstallationMedia: Ubuntu 24.04.2 LTS "Noble Numbat" - Release amd64 (20250215) MachineType: ASUSTeK COMPUTER INC. ROG Zephyrus G16 GU605MI_GU605MI Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.11.0-26-generic root=UUID=10b31c36-2ee7-41c7-ba5f-4ce90690c4ab ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 6.11.0-26.26~24.04.1-generic 6.11.11 RebootRequiredPkgs: Error: path contained symlinks. RelatedPackageVersions: linux-restricted-modules-6.11.0-26-generic N/A linux-backports-modules-6.11.0-26-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.12 Tags: noble Uname: Linux 6.11.0-26-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True dmi.bios.date: 08/14/2024 dmi.bios.release: 5.32 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: GU605MI.323 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: GU605MI dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: 1.0 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK COMPUTER INC. dmi.chassis.version: 1.0 dmi.ec.firmware.release: 3.22 dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrGU605MI.323:bd08/14/2024:br5.32:efr3.22:svnASUSTeKCOMPUTERINC.:pnROGZephyrusG16GU605MI_GU605MI:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnGU605MI:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:sku: dmi.product.family: ROG Zephyrus G16 dmi.product.name: ROG Zephyrus G16 GU605MI_GU605MI dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK COMPUTER INC. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2112165/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
