Public bug reported: Upstream bug: https://gitlab.freedesktop.org/drm/amd/-/issues/3655:
Actually the issue happen when 1. Login to a system to console mode, set brightness to 5% (light -S 5 or direct in sysfs), run compositor from command line. Screen brightness go up. 2. Turn brigtness down to 5% in wayfire screen, switch to text console and back to wayfire - again screen brightness goes up. 3. Turn brightness to 5% in wayfire and then screen blanks at idle. Touch key or mouse - screen again runs on the much higher brightness. In all cases in the /sys/class/backlight/amdgpu_bl0 directory brightness keep the value I set (5%) - but the actual brightness is different. So system somehpw ignores the value in brightness and not setting actual brightness the same but fill it with some default. == Proposed fix https://github.com/torvalds/linux/commit/4f26c95ffc21a91281429ed60180619bae19ae92 (in v6.12-rc7, and d83c747a1225d as in v6.11.8) ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: Invalid ** Affects: linux-oem-6.11 (Ubuntu Noble) Importance: High Assignee: You-Sheng Yang (vicamo) Status: In Progress ** Tags: amd oem-priority originate-from-2089542 ** Also affects: linux-oem-6.11 (Ubuntu) Importance: Undecided Status: New ** No longer affects: linux (Ubuntu) -- 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/2090789 Title: display brightness level not retained over reboot with amdgpu Status in HWE Next: New Status in linux-oem-6.11 package in Ubuntu: Invalid Status in linux-oem-6.11 source package in Noble: In Progress Bug description: Upstream bug: https://gitlab.freedesktop.org/drm/amd/-/issues/3655: Actually the issue happen when 1. Login to a system to console mode, set brightness to 5% (light -S 5 or direct in sysfs), run compositor from command line. Screen brightness go up. 2. Turn brigtness down to 5% in wayfire screen, switch to text console and back to wayfire - again screen brightness goes up. 3. Turn brightness to 5% in wayfire and then screen blanks at idle. Touch key or mouse - screen again runs on the much higher brightness. In all cases in the /sys/class/backlight/amdgpu_bl0 directory brightness keep the value I set (5%) - but the actual brightness is different. So system somehpw ignores the value in brightness and not setting actual brightness the same but fill it with some default. == Proposed fix https://github.com/torvalds/linux/commit/4f26c95ffc21a91281429ed60180619bae19ae92 (in v6.12-rc7, and d83c747a1225d as in v6.11.8) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2090789/+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
