[Bug 105414] R9 285 agd5f 4.17-wip DC flip_done timed out

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105414

            Bug ID: 105414
           Summary: R9 285 agd5f 4.17-wip DC flip_done timed out
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: adf.lists at gmail.com

Created attachment 137926
  --> https://bugs.freedesktop.org/attachment.cgi?id=137926&action=edit
dmesg with errors and bt

agd5f 4.17-wip with only with amdgpu.dc=1 I can hang display with Unreal
tournament demo, backtrace at end of attached dmesg.
The game notices and times out after 30sec and I regain display.
This is just on initial menu possibly moving mouse to trigger - time taken to
trigger 1 - 5 seconds.

Other things seem OK, but there is also rare display glitch in normal use where
it seems that a black frame is displayed or something. May be luck, and I've
only seen it a few times, but was moving mouse at the time.

No bisect, recent bugs seem to go away next update anyway + the last "DC team"
bug I took time to bisect has been unanswered since December - though it may be
very specific to my setup, unanswered = less motivation to bisect.

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