[Bug 86721] New: Graphics driver crashes occassionally

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86721

            Bug ID: 86721
           Summary: Graphics driver crashes occassionally
           Product: DRI
           Version: XOrg git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: maarten256 at hotmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Recently I started encountering prblems where my screen will go dark at the
most inopportune moments.

I gathered the following snippet from /var/log/kern.log:

Nov 25 23:34:06 sony-laptop kernel: [  563.992062] [drm] stuck on render ring
Nov 25 23:34:06 sony-laptop kernel: [  563.992070] [drm] GPU crash dump saved
to /sys/class/drm/card0/error
Nov 25 23:34:06 sony-laptop kernel: [  563.992073] [drm] GPU hangs can indicate
a bug anywhere in the entire gfx stack, including userspace.
Nov 25 23:34:06 sony-laptop kernel: [  563.992076] [drm] Please file a _new_
bug report on bugs.freedesktop.org against DRI -> DRM/Intel
Nov 25 23:34:06 sony-laptop kernel: [  563.992078] [drm] drm/i915 developers
can then reassign to the right component if it's not a kernel issue.
Nov 25 23:34:06 sony-laptop kernel: [  563.992080] [drm] The gpu crash dump is
required to analyze gpu hangs, so please always attach it.
Nov 25 23:34:06 sony-laptop kernel: [  563.993312] [drm:i915_set_reset_status]
*ERROR* render ring hung inside bo (0x547c000 ctx 0) at 0x547cff0
Nov 25 23:34:06 sony-laptop kernel: [  564.504051] [drm:i915_reset] *ERROR*
Failed to reset chip.
Nov 25 23:34:08 sony-laptop kernel: [  565.892050] [drm] GMBUS [i915 gmbus vga]
timed out, falling back to bit banging on pin 2

So in following the instructions I am opening a bug on this :). Since this is
not a problem related to Radeon (I appear to have an integrated Intel GPU),
most other "similar" bugs are not relevant (or do not appear to be).

Unfortunately I have not yet saved the crashdump (/sys/class/drm/card0/error)
so when I rebooted my machine the last dump appears to have been overwritten.

I'll attach a dump when the problem occurs again - assuming I can recreate it.

Some information on my system:

$ lscpu
Architecture:          i686
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                2
On-line CPU(s) list:   0,1
Thread(s) per core:    1
Core(s) per socket:    2
Socket(s):             1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 15
Stepping:              13
CPU MHz:               800.000
BogoMIPS:              2925.93
L1d cache:             32K
L1i cache:             32K
L2 cache:              1024K

$ uname -a
Linux sony-laptop 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:08:14 UTC 2014
i686 i686 i686 GNU/Linux

$ cat /etc/lsb-release
DISTRIB_ID=LinuxMint
DISTRIB_RELEASE=17
DISTRIB_CODENAME=qiana
DISTRIB_DESCRIPTION="Linux Mint 17 Qiana"

Please let me know what other information is required.

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