[Bug 91894] New: GPU Hangs since Kernel-4.2 upgrade

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91894

            Bug ID: 91894
           Summary: GPU Hangs since Kernel-4.2 upgrade
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: krejzi at email.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

It hangs soon as Firefox starts playing any HTML5 video. ickle highlighted it
might be an issue with vaapi, which I can confirm that Firefox is using. As a
side note, the same thing happens on weston when playing video in epiphany,
which also uses gstreamer and utilizes gstreamer-vaapi.

Relevant info from dmesg:

Sep 04 07:16:56 krejzi kernel: [drm] stuck on render ring
Sep 04 07:16:56 krejzi kernel: [drm] stuck on blitter ring
Sep 04 07:16:56 krejzi kernel: [drm] GPU HANG: ecode 6:0:0xf4e9fffe, in Xorg
[400], reason: Ring hung, action: reset
Sep 04 07:16:56 krejzi kernel: [drm] GPU hangs can indicate a bug anywhere in
the entire gfx stack, including userspace.
Sep 04 07:16:56 krejzi kernel: [drm] Please file a _new_ bug report on
bugs.freedesktop.org against DRI -> DRM/Intel
Sep 04 07:16:56 krejzi kernel: [drm] drm/i915 developers can then reassign to
the right component if it's not a kernel issue.
Sep 04 07:16:56 krejzi kernel: [drm] The gpu crash dump is required to analyze
gpu hangs, so please always attach it.
Sep 04 07:16:56 krejzi kernel: [drm] GPU crash dump saved to
/sys/class/drm/card0/error
Sep 04 07:16:56 krejzi kernel: [drm:i915_set_reset_status] *ERROR* gpu hanging
too fast, banning!
Sep 04 07:16:56 krejzi kernel: drm/i915: Resetting chip after gpu hang
Sep 04 07:17:20 krejzi kernel: [drm] stuck on render ring
Sep 04 07:17:20 krejzi kernel: [drm] GPU HANG: ecode 6:0:0x87e8fffd, in
kwin_x11 [560], reason: Ring hung, action: reset
Sep 04 07:17:20 krejzi kernel: drm/i915: Resetting chip after gpu hang

/sys/class/drm/card0/error, from two different hangs:

http://www.linuxfromscratch.org/~krejzi/error.log
http://www.linuxfromscratch.org/~krejzi/error2.log

Linux-4.2, libdrm-2.4.64, mesa-11.0.0-rc2, xorg-server-1.17.99.901,
xf86-video-intel-2.99.917 (git from today, with UXA acceleration backend, but
I've tried SNA too, no diff), libva-1.6.0, libva-intel-driver-1.6.0,
gstreamer-1.5.90, gstreamer-vaapi-0.6.0

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