** Description changed: [Impact] Sometimes the system boots up with a acpi_backlight0 sysfs interface which doesn't work. The real backlight interface is amdgpu_bl0 which is provided by the amdgpu [Fix] Add this machine to the video_detect_dmi_table [Verify] + Verified by our QA and ODM. [Where problems could occur] + Pretty safe to add the DMI quirk, won't affect other platforms.
** Description changed: [Impact] - Sometimes the system boots up with a acpi_backlight0 sysfs interface which doesn't work. The real backlight interface is amdgpu_bl0 which is provided by the amdgpu + Sometimes the system boots up with both acpi_video0 and amdgpu_bl0 sysfs interfaces and the acpi_video0 doesn't work. [Fix] - Add this machine to the video_detect_dmi_table + Add this machine to the video_detect_dmi_table to force it uses native backlight interface which is amdgpu_bl0. [Verify] Verified by our QA and ODM. [Where problems could occur] Pretty safe to add the DMI quirk, won't affect other platforms. ** Description changed: [Impact] Sometimes the system boots up with both acpi_video0 and amdgpu_bl0 sysfs interfaces and the acpi_video0 doesn't work. [Fix] Add this machine to the video_detect_dmi_table to force it uses native backlight interface which is amdgpu_bl0. + https://lkml.org/lkml/2023/3/2/187 + [Verify] Verified by our QA and ODM. [Where problems could occur] Pretty safe to add the DMI quirk, won't affect other platforms. -- 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/2008871 Title: Screen backlight keeps in minimized and can't change it with amdgpu Status in linux package in Ubuntu: In Progress Status in linux-oem-6.1 package in Ubuntu: Invalid Status in linux source package in Jammy: Invalid Status in linux-oem-6.1 source package in Jammy: In Progress Status in linux source package in Lunar: In Progress Status in linux-oem-6.1 source package in Lunar: Invalid Bug description: [Impact] Sometimes the system boots up with both acpi_video0 and amdgpu_bl0 sysfs interfaces and the acpi_video0 doesn't work. [Fix] Add this machine to the video_detect_dmi_table to force it uses native backlight interface which is amdgpu_bl0. https://lkml.org/lkml/2023/3/2/187 [Verify] Verified by our QA and ODM. [Where problems could occur] Pretty safe to add the DMI quirk, won't affect other platforms. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2008871/+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
