[Bug 99478] New: GPU hang on Skylake at gdm login

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99478

            Bug ID: 99478
           Summary: GPU hang on Skylake at gdm login
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: mail at dietzm.de
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 129077
  --> https://bugs.freedesktop.org/attachment.cgi?id=129077&action=edit
GPU crash dump

Running Fedora 25 on a Intel NUC 6i5SYH with Intel Iris Graphics 540 causes GPU
hangs at right after the boot (gdm). It happens always, no chance to login.


[  304.645809] [drm] GPU HANG: ecode 9:0:0x85df7efb, in Xorg [13399], reason:
Hang on render ring, action: reset
[  304.645812] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  304.645814] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  304.645816] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  304.645818] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  304.645820] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[  304.647239] drm/i915: Resetting chip after gpu hang
[  304.647327] [drm] RC6 off
[  304.661856] [drm] GuC firmware load skipped
[  316.612872] drm/i915: Resetting chip after gpu hang
[  316.612957] [drm] RC6 off
[  316.629068] [drm] GuC firmware load skipped
[  359.070702] show_signal_msg: 3 callbacks suppressed
[  359.070706] gnome-session-f[13702]: segfault at 0 ip 00007f8142fa2869 sp
00007ffd40922680 error 4 in libgtk-3.so.0.2200.6[7f8142cc4000+6f6000]
[  868.601004] drm/i915: Resetting chip after gpu hang
[  868.601100] [drm] RC6 off
[  868.615126] [drm] GuC firmware load skipped
[  882.616833] drm/i915: Resetting chip after gpu hang
[  882.616926] [drm] RC6 off
[  882.628849] [drm] GuC firmware load skipped
[  963.013467] gnome-session-f[15641]: segfault at 0 ip 00007ff9c8b2d869 sp
00007fff4a834b40 error 4 in libgtk-3.so.0.2200.6[7ff9c884f000+6f6000]
[ 1055.605524] drm/i915: Resetting chip after gpu hang
[ 1055.605643] [drm] RC6 off
[ 1055.620968] [drm] GuC firmware load skipped

I tried to disable wayland and play around with different xorg config. 
Using "intel" as a driver did never work. It only works with the following
config (but without hw acceleration):
Section "Device"
        Identifier  "Intel Graphics"
        Driver      "modesetting"
        Option      "AccelMethod"  "uxa"
EndSection


>uname -a
Linux nslu 4.9.3-200.fc25.x86_64 #1 SMP Fri Jan 13 01:01:13 UTC 2017 x86_64
x86_64 x86_64 GNU/Linux

Monitor is connected via HDMI or Dispayport

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