SRU submitted, thanks https://lists.ubuntu.com/archives/kernel-team/2023-January/136392.html
** Description changed: [Impact] The commit in 5.17.0.1026.27 introduce an regression that leads to the panel of ThinkPad L14 Gen 3 becomes blank after bootup 224dffc89a957 drm/amdgpu: make sure to init common IP before gmc [Fix] Revert this commit as it looks like it requires some other commits to work together, and from the discussion of the 5.10 stable, this commit has been reverted, too. https://gitlab.freedesktop.org/drm/amd/-/issues/2216 BTW, confirmed by Aaron Ma that 6.0 and 6.1 OEM kernels work well with this commit, so no need to revert it. [Test] - Verified by Aaron Ma. + Verified by Aaron Ma and the bug reporter. [Where problems could occur] Revert this commit will lead to the keep rebooting issue be re-opened(bug 2000110), I'll check the issue again and submit another solution for it. ================ When booting linux-image-5.17.0-1026-oem version 5.17.0.1026.27 on a Lenovo ThinkPad L14 Gen 3 AMD (model 21C5CTO1WW), the screen goes blank shortly after bootup. As far as I can tell (the screen blanks pretty quickly, so I'm not 100% sure), the last message before the screen disappears is this one: Jan 9 07:58:30 work kernel: [ 1.321487] fb0: switching to amdgpu from EFI VGA Booting linux-image-5.17.0-1025-oem version 5.17.0.1025.26 works fine, so this appears to be a regression in whatever changes there were in the framebuffer/amdgpu drivers between 5.17.0.1025.26 and 5.17.0.1026.27. I think this should be high priority, because it gives the impression that the system is completely borked, when in actuality it's probably just waiting for me to enter my drive encryption password. If I type the encryption password, it seems to progress to starting the system (the microphone mute LED comes on as expected), but even X starting does not turn the screen back on. Switching to the frame buffer console with Ctrl-Alt-Fx does nothing. ** Changed in: linux-oem-5.17 (Ubuntu Jammy) Status: Triaged => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.17 in Ubuntu. https://bugs.launchpad.net/bugs/2002467 Title: ThinkPad L14 Gen 3 blank laptop screen on bootup Status in linux-oem-5.17 package in Ubuntu: Invalid Status in linux-oem-5.17 source package in Jammy: In Progress Bug description: [Impact] The commit in 5.17.0.1026.27 introduce an regression that leads to the panel of ThinkPad L14 Gen 3 becomes blank after bootup 224dffc89a957 drm/amdgpu: make sure to init common IP before gmc [Fix] Revert this commit as it looks like it requires some other commits to work together, and from the discussion of the 5.10 stable, this commit has been reverted, too. https://gitlab.freedesktop.org/drm/amd/-/issues/2216 BTW, confirmed by Aaron Ma that 6.0 and 6.1 OEM kernels work well with this commit, so no need to revert it. [Test] Verified by Aaron Ma and the bug reporter. [Where problems could occur] Revert this commit will lead to the keep rebooting issue be re-opened(bug 2000110), I'll check the issue again and submit another solution for it. ================ When booting linux-image-5.17.0-1026-oem version 5.17.0.1026.27 on a Lenovo ThinkPad L14 Gen 3 AMD (model 21C5CTO1WW), the screen goes blank shortly after bootup. As far as I can tell (the screen blanks pretty quickly, so I'm not 100% sure), the last message before the screen disappears is this one: Jan 9 07:58:30 work kernel: [ 1.321487] fb0: switching to amdgpu from EFI VGA Booting linux-image-5.17.0-1025-oem version 5.17.0.1025.26 works fine, so this appears to be a regression in whatever changes there were in the framebuffer/amdgpu drivers between 5.17.0.1025.26 and 5.17.0.1026.27. I think this should be high priority, because it gives the impression that the system is completely borked, when in actuality it's probably just waiting for me to enter my drive encryption password. If I type the encryption password, it seems to progress to starting the system (the microphone mute LED comes on as expected), but even X starting does not turn the screen back on. Switching to the frame buffer console with Ctrl-Alt-Fx does nothing. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oem-5.17/+bug/2002467/+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
