[Bug 61477] New: Mouse pointer disappears with "Hangcheck timer elapsed... GPU hung"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=61477

          Priority: medium
            Bug ID: 61477
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: Mouse pointer disappears with "Hangcheck timer
                    elapsed... GPU hung"
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: yarvin at yarchive.net
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 75544
  --> https://bugs.freedesktop.org/attachment.cgi?id=75544&action=edit
i915_error_state

About once a week or so, randomly, I've been getting an error whose main
visible manifestation is that the mouse pointer disappears.  (The mouse motion
logic is still active, and I can successfully click on things and change window
focus; it's just the pointer that disappears.)  This is on a G965 chip:

00:02.0 VGA compatible controller: Intel Corporation 82G965 Integrated Graphics
Controller (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Intel Corporation Device 514d
        Flags: bus master, fast devsel, latency 0, IRQ 47
        Memory at e0400000 (32-bit, non-prefetchable) [size=1M]
        Memory at d0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 3410 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [d0] Power Management version 2
        Kernel driver in use: i915

and with Linux kernel versions 3.7 and 3.8 (Gentoo), and xf86-video-intel
version 2.21.3 (and one or two prior versions, I'm not sure exactly which).  I
don't think I had the bug with kernel 3.6; certainly not before that.  When the
bug occurs, the system log has the lines:

      Feb 25 22:23:00 muttonhead kernel: [drm:i915_hangcheck_hung] *ERROR*
Hangcheck timer elapsed... GPU hung
      Feb 25 22:23:00 muttonhead kernel: [drm] capturing error event; look for
more information in /debug/dri/0/i915_error_state
      Feb 25 22:23:01 muttonhead kernel: [drm:i915_reset] *ERROR* Failed to
reset chip.

and on another occasion there was also the line:

      Feb 19 22:05:56 muttonhead kernel: [drm:kick_ring] *ERROR* Kicking stuck
wait on render ring

before the "failed to reset" line.  After the bug occurs, I can still do pretty
much everything I've tried (if I can manage it without seeing the mouse
pointer), but I'm still using fvwm, and things might be different if I were
using a compositing window manager.  The one other failure is that shutting
down X doesn't restore the console properly: it just gives me a blank screen. 
(But not a hang; control-alt-delete still shuts down the machine properly.)

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