[Bug 94358] New: Display sleep mode causes session crash

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94358

            Bug ID: 94358
           Summary: Display sleep mode causes session crash
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: inform at tiker.net
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 122068
  --> https://bugs.freedesktop.org/attachment.cgi?id=122068&action=edit
Crash log

It's a little tricky to pinpoint what's causing this, so I'm starting here.

I recently got a shiny new 4k monitor (Dell P2715Q), which I'm running off the
(mini) DisplayPort of my ThinkPad X250. Now it seems that whenever display
power saving kicks in, my X11 session dies, with the attached log from
"journalctl". As you can probably imagine, this is highly irritating. Any help
in tracking this down would be much appreciated. For what it's worth, this does
not seem to happen with lower-resolution monitors (various Dell 2560x1440
monitors for example).

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