[Bug 107968] New: GPU HANG: ecode 9:0:0x85dffffb, in zoom [29759], reason: Hang on render ring, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107968

            Bug ID: 107968
           Summary: GPU HANG: ecode 9:0:0x85dffffb, in zoom [29759],
                    reason: Hang on render ring, action: reset
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: marcin at owsiany.pl
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 141620
  --> https://bugs.freedesktop.org/attachment.cgi?id=141620&action=edit
/sys/class/drm/card0/error

My case sounds similar to https://bugs.freedesktop.org/show_bug.cgi?id=101203
but dmesg told me to file a new bug, so here it is.

Using Debian stable with kernel 4.9.0-8-amd64 #1 SMP Debian 4.9.110-3+deb9u4
(2018-08-21) on Lenovo T580 laptop with the following device:

00:02.0 VGA compatible controller: Intel Corporation Device 5917 (rev 07)
(prog-if 00 [VGA controller])
        Subsystem: Lenovo Device 225a
        Flags: bus master, fast devsel, latency 0, IRQ 143
        Memory at e7000000 (64-bit, non-prefetchable) [size=16M]
        Memory at c0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at e000 [size=64]
        [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915


I use zoom conference approximately once per day on average, and it crashes due
to this hang in about one out of 3 uses at seemingly random times while the
conference is on. I do not know how to reproduce this at will.

In my case the message was:
[275903.554471] [drm] GPU HANG: ecode 9:0:0x85dffffb, in zoom [29759], reason:
Hang on render ring, action: reset
[275903.554474] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[275903.554475] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[275903.554476] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[275903.554477] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.
[275903.554478] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[275903.554576] drm/i915: Resetting chip after gpu hang
[275903.554650] [drm] RC6 on
[275903.574354] [drm] GuC firmware load skipped
[275914.529457] drm/i915: Resetting chip after gpu hang
[275914.529542] [drm] RC6 on
[275914.547604] [drm] GuC firmware load skipped

Attaching the crash dump.

I wonder whether someone would be able to figure out a specific fix that could
be backported to Debian stable's kernel?

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