I just tested signed Ubuntu kernel 5.13.0-28-generic which is in Proposed right now, but it does not fix the issue. Brightness adjustments work, but service fails during startup and screen is at full brightness every boot (at gdm and at GNOME 3 desktop).
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1954843 Title: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument Status in linux package in Ubuntu: Confirmed Status in systemd package in Ubuntu: Confirmed Bug description: Ubuntu 21.10 does not succeed at setting the display brightness after booting (either to the GNOME login screen or to a logged-in user's desktop). The brightness is at its highest level until I adjust it with keyboard shortcuts or a GUI tool. The systemd-backlight@backlight:amdgpu_bl0 service seems to fail during startup, but I can subsequently run it after startup and it succeeds (and restores brightness): mdmower@T14S ~ $ sudo systemctl status systemd-backlight@backlight:amdgpu_bl0 [sudo] password for mdmower: × systemd-backlight@backlight:amdgpu_bl0.service - Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0 Loaded: loaded (/lib/systemd/system/systemd-backlight@.service; static) Active: failed (Result: exit-code) since Tue 2021-12-14 13:26:05 PST; 30s ago Docs: man:systemd-backlight@.service(8) Process: 962 ExecStart=/lib/systemd/systemd-backlight load backlight:amdgpu_bl0 (code=exited, status=1/FAILURE) Main PID: 962 (code=exited, status=1/FAILURE) CPU: 3ms Dec 14 13:26:05 T14S systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0... Dec 14 13:26:05 T14S systemd-backlight[962]: amdgpu_bl0: Failed to write system 'brightness' attribute: Invalid argument Dec 14 13:26:05 T14S systemd[1]: systemd-backlight@backlight:amdgpu_bl0.service: Main process exited, code=exited, status=1/FAILURE Dec 14 13:26:05 T14S systemd[1]: systemd-backlight@backlight:amdgpu_bl0.service: Failed with result 'exit-code'. Dec 14 13:26:05 T14S systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0. mdmower@T14S ~ $ sudo systemctl start systemd- backlight@backlight:amdgpu_bl0 mdmower@T14S ~ $ sudo systemctl status systemd-backlight@backlight:amdgpu_bl0 ● systemd-backlight@backlight:amdgpu_bl0.service - Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0 Loaded: loaded (/lib/systemd/system/systemd-backlight@.service; static) Active: active (exited) since Tue 2021-12-14 13:26:45 PST; 1s ago Docs: man:systemd-backlight@.service(8) Process: 5119 ExecStart=/lib/systemd/systemd-backlight load backlight:amdgpu_bl0 (code=exited, status=0/SUCCESS) Main PID: 5119 (code=exited, status=0/SUCCESS) CPU: 5ms Dec 14 13:26:45 T14S systemd[1]: Starting Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0... Dec 14 13:26:45 T14S systemd[1]: Finished Load/Save Screen Backlight Brightness of backlight:amdgpu_bl0. ProblemType: Bug DistroRelease: Ubuntu 21.10 Package: xorg 1:7.7+22ubuntu2 ProcVersionSignature: Ubuntu 5.13.0-22.22-generic 5.13.19 Uname: Linux 5.13.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu71 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CasperMD5CheckResult: pass CompositorRunning: None CurrentDesktop: ubuntu:GNOME Date: Tue Dec 14 13:29:38 2021 DistUpgraded: Fresh install DistroCodename: impish DistroVariant: ubuntu ExtraDebuggingInterest: Yes GraphicsCard: Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [1002:1638] (rev d1) (prog-if 00 [VGA controller]) Subsystem: Lenovo Cezanne [17aa:5095] InstallationDate: Installed on 2021-12-12 (2 days ago) InstallationMedia: Ubuntu 21.10 "Impish Indri" - Release amd64 (20211012) MachineType: LENOVO 20XF004WUS ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-22-generic root=UUID=859a72cc-a3fe-470f-b525-37b151408289 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/08/2021 dmi.bios.release: 1.14 dmi.bios.vendor: LENOVO dmi.bios.version: R1NET44W (1.14) dmi.board.asset.tag: Not Available dmi.board.name: 20XF004WUS dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.ec.firmware.release: 1.14 dmi.modalias: dmi:bvnLENOVO:bvrR1NET44W(1.14):bd11/08/2021:br1.14:efr1.14:svnLENOVO:pn20XF004WUS:pvrThinkPadT14sGen2a:rvnLENOVO:rn20XF004WUS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20XF_BU_Think_FM_ThinkPadT14sGen2a: dmi.product.family: ThinkPad T14s Gen 2a dmi.product.name: 20XF004WUS dmi.product.sku: LENOVO_MT_20XF_BU_Think_FM_ThinkPad T14s Gen 2a dmi.product.version: ThinkPad T14s Gen 2a dmi.sys.vendor: LENOVO version.compiz: compiz N/A version.libdrm2: libdrm2 2.4.107-8ubuntu1 version.libgl1-mesa-dri: libgl1-mesa-dri 21.2.2-1ubuntu1 version.libgl1-mesa-glx: libgl1-mesa-glx N/A version.xserver-xorg-core: xserver-xorg-core 2:1.20.13-1ubuntu1 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2build1 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200714-1ubuntu2 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-1build1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1954843/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
