[Bug 109526] [CARRIZO] amdgpu fails to resume from S3, atombios stuck executing C554 (len 629, WS 0, PS 0)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109526

            Bug ID: 109526
           Summary: [CARRIZO] amdgpu fails to resume from S3, atombios
                    stuck executing C554 (len 629, WS 0, PS 0)
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: johannes.hirte at datenkhaos.de

there is already a similar report at kernel bugzilla, but nobody took notice:
https://bugzilla.kernel.org/show_bug.cgi?id=190971

It's a kernel bug, first seen with linux-4.20 on my Carrizo. I don't have a
testcase for reproducing, so it's hard to bisect. Sometimes it happens multiple
times a day, with every suspend-resume cycle. Sometimes the machine works for
several days with at least two suspend-resume-cycles per day.

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