[Bug 105550] New: Xorg hang for several seconds when opening application window

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105550

            Bug ID: 105550
           Summary: Xorg hang for several seconds when opening application
                    window
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: eraserix at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 138153
  --> https://bugs.freedesktop.org/attachment.cgi?id=138153&action=edit
dump of gpu error state

Just seen this GPU-hanger once, will report back if it occurs again. The
application was in the system tray and when I tried to open the window, the
system seemed frozen for several seconds.

$ uname -a
Linux ch10dd405 4.9.76-realtime-1-rt61 #1 SMP PREEMPT RT Wed Jan 17 14:36:24
CET 2018 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -a 
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.5 LTS
Release:        14.04
Codename:       trusty

$ lspci -v | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation Device 5912 (rev 04)
(prog-if 00 [VGA controller])

$ cat /proc/cpuinfo | grep "model name" -m 1
model name      : Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz


[145347.575536] [drm] GPU HANG: ecode 9:0:0x00775757, in Worklog Assista
[18034], reason: Hang on render ring, action: reset
[145347.575540] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[145347.575540] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[145347.575540] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[145347.575541] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[145347.575543] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[145347.575581] drm/i915: Resetting chip after gpu hang
[145347.575621] [drm] RC6 on
[145347.593831] [drm] GuC firmware load skipped
[145359.543380] drm/i915: Resetting chip after gpu hang
[145359.543422] [drm] RC6 on
[145359.561485] [drm] GuC firmware load skipped

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