[Nouveau] [Bug 85605] New: gk106: GPU lockup on resume (3.16)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85605

            Bug ID: 85605
           Summary: gk106: GPU lockup on resume (3.16)
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: freedesktop at edsantiago.com
        QA Contact: xorg-team at lists.x.org

Created attachment 108632
  --> https://bugs.freedesktop.org/attachment.cgi?id=108632&action=edit
journalctl -b (via ssh) with excerpts from suspend and resume

Dell M4800 with QHD+ display -- NVIDIA Corporation GK106GLM [Quadro K2100M]
(rev a1), 3.16.6-gentoo.

systemctl suspend works cleanly and quickly. Resume (power button), not so
much:

   09:33:43 kernel: nouveau E[     DRM] GPU lockup - switching to software
fbcon
   09:33:58 kernel: nouveau E[ X[4664]] failed to idle channel 0xcccc0000
[X[4664]]

...lots more. See attachment. X screen flashes briefly but is unusable and
corrupt (color bars, blocks offset/shifted, no cursor anyway).

This is on a good boot (ref bug 85495).

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