[Bug 87940] New: [drm] stuck on render ring

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=87940

            Bug ID: 87940
           Summary: [drm] stuck on render ring
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: minor
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: bruno.pagani at ens-lyon.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 111619
  --> https://bugs.freedesktop.org/attachment.cgi?id=111619&action=edit
/sys/class/drm/card0/error

I’m using ArchLinux.

mesa 10.4.1
linux 3.17.6
xf86-video-intel 2.99.917

When I use the session type switch in SDDM (my login manager), after selecting
one of the option, the display hangs for some seconds, and then everything is
back to the normal. This 100% of time reproducible here.

When looking at dmesg, I see this:

[  940.205802] [drm] stuck on render ring
[  940.206915] [drm] GPU HANG: ecode 0:0xf5dffffe, in sddm-greeter [1439],
reason: Ring hung, action: reset
[  940.206919] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[  940.206922] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[  940.206925] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[  940.206928] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[  940.206931] [drm] GPU crash dump saved to /sys/class/drm/card0/error

So, please find the GPU crash dump attached, and tell me if there is anything I
can do to help you fixing this. Since there was a file size limit to 3000 KB,
I’ve simplified the dump by removing all identical line in an hexdump manner,
adding * to signify all lines where identical between the one above and the one
below. If you need the original file, I can upload it elsewhere, or upload a
compressed version.

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