[Bug 81888] New: Freeze when screen switches back on

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81888

          Priority: medium
            Bug ID: 81888
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Freeze when screen switches back on
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: mike at fireburn.co.uk
          Hardware: Other
            Status: NEW
           Version: DRI CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 103658
  --> https://bugs.freedesktop.org/attachment.cgi?id=103658&action=edit
Dmesg

When the screen switches on after being off (DPMS?) lots of kernel warnings are
produced and the screen freezes - the cursor still moves though

Before I could switch VTs several times and toggle compositing to bring back
the session. With the latest stack I now have to restart X

I was using xorg-server from git but I've switched back to 1.16 - dri3 is
enabled

I'm using linus's tree (drm-next won't boot at the moment and I've not bisected
yet) 

libdrm and mesa are both from git as is xf86-video-intel

This is a sandybridge machine

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