Bug 215025 - [amdgpu] Thinkpad A275 hangs on shutdown / screen does not turn on after reboot
Summary: [amdgpu] Thinkpad A275 hangs on shutdown / screen does not turn on after reboot
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-dri
Depends on:
Reported: 2021-11-14 23:33 UTC by Bjoern Franke
Modified: 2021-11-16 09:51 UTC (History)
1 user (show)

See Also:
Kernel Version: 5.15.2
Tree: Mainline
Regression: No

dmesg (83.64 KB, text/plain)
2021-11-15 22:39 UTC, Bjoern Franke

Description Bjoern Franke 2021-11-14 23:33:45 UTC
My Thinkpad A275 hangs while going into suspend. The screen turned off, but it does not really enter suspend mode (according to journalctl it started suspending). Even after reboots the screen does not turn on again, I have to power off the Thinkpad and then power it on again. The issue did not exist with 5.14.x.
Comment 1 Bjoern Franke 2021-11-14 23:37:03 UTC
BTW, iommu is enabled:
[    0.739887] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank).
Comment 2 Bjoern Franke 2021-11-15 00:15:00 UTC
Tested 5.14.16 - ok
Tried 5.15.0 and 5.15.1 -> don't even boot, the first 3 lines look misarranged.

I will try to bisect between 5.14.16 and 5.15.2.
Comment 3 Bjoern Franke 2021-11-15 10:00:59 UTC
mainline 5.16rc1 is also affected.
Comment 4 Bjoern Franke 2021-11-15 10:12:04 UTC
It seems it is https://gitlab.freedesktop.org/drm/amd/-/issues/1789
Comment 5 Alex Deucher 2021-11-15 17:53:13 UTC
Please include your dmesg output.  Does this patch fix it?
Comment 6 Bjoern Franke 2021-11-15 22:39:33 UTC
Created attachment 299595 [details]
Comment 7 Bjoern Franke 2021-11-15 22:40:23 UTC
The patch fixes it, thanks.

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