|Summary:||black screen with "drm/amd/display: Do not limit color depth to 8bpc" e03fd3f300f6184c1264186a4c815e93bf658abb >=4.18|
|Product:||DRI||Reporter:||Andrey Arapov <andrey.arapov>|
|Component:||DRM/AMDgpu||Assignee:||Default DRI bug account <dri-devel>|
|Status:||RESOLVED MOVED||QA Contact:|
|Priority:||medium||CC:||harry.wentland, nicholas.kazlauskas, ronny.standtke|
|i915 platform:||i915 features:|
Description Andrey Arapov 2018-11-08 10:59:18 UTC
Hello, some of the MacBookPro 14,3 users have been struggling with the black screen issue on their systems, I have been bisecting the kernel commits that came to v4.18-rc1 and found that the problem is gone when I revert this commit "drm/amd/display: Do not limit color depth to 8bpc" e03fd3f300f6184c1264186a4c815e93bf658abb I presume that the driver cannot get the display_info.bpc from the screen so it defaults to COLOR_DEPTH_UNDEFINED causing the black screen. Please let me know, https://github.com/torvalds/linux/commit/e03fd3f300f6184c1264186a4c815e93bf658abb Followed-by https://github.com/Dunedan/mbp-2016-linux/issues/73#issuecomment-422397681 Kind Regards, Andrey Arapov P.S. I have been sending an email to Harry Wentland & Alex Deucher on 18 Sept. 2018, but no response followed.
Comment 1 Ronny Standtke 2018-11-08 18:52:32 UTC
I can confirm the bug. We provide an exam environment based on Debian Live. Since we switched to Kernel 4.18 (provided in Debian backports) we have seen *many* Macs failing to boot and just showing a black screen. So at least for us this regression is quite severe...
Comment 2 Alex Deucher 2018-11-08 19:27:54 UTC
This patchset may help: https://patchwork.freedesktop.org/series/52164/
Comment 3 Andrey Arapov 2018-11-20 12:45:37 UTC
(In reply to Alex Deucher from comment #2) > This patchset may help: > https://patchwork.freedesktop.org/series/52164/ Thank you, Alex. I can confirm, the patches worked for me. I have adapted them for Linux 4.19.2 - https://gist.github.com/arno01/8115ef124fe7f42bbf1c317892013e86 Any plans for including them in the next Linux release? Kind Regards, Andrey Arapov
Comment 4 Alex Deucher 2018-11-20 15:31:29 UTC
(In reply to Andrey Arapov from comment #3) > (In reply to Alex Deucher from comment #2) > > This patchset may help: > > https://patchwork.freedesktop.org/series/52164/ > > Thank you, Alex. > > I can confirm, the patches worked for me. > I have adapted them for Linux 4.19.2 - > https://gist.github.com/arno01/8115ef124fe7f42bbf1c317892013e86 > > > Any plans for including them in the next Linux release? yes. They should land in 4.20 soon.
Comment 5 Martin Peres 2019-11-19 09:03:37 UTC
-- GitLab Migration Automatic Message -- This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/602.