[Bug 79238] New: [SNA G33/31] xorg/ddx hits kgem_check_many_bo_fenced: Assertion `bo->refcnt' failed.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79238

          Priority: high
            Bug ID: 79238
          Assignee: chris at chris-wilson.co.uk
           Summary: [SNA G33/31] xorg/ddx hits kgem_check_many_bo_fenced:
                    Assertion `bo->refcnt' failed.
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: ccr at tnsp.org
          Hardware: x86 (IA32)
            Status: NEW
           Version: unspecified
         Component: Driver/intel
        Depends on: 73406
           Product: xorg

Created attachment 99820
  --> https://bugs.freedesktop.org/attachment.cgi?id=99820&action=edit
GDB session log

The assert hit is very occasional/random. Sometimes it is reproducible several
times in row, sometimes several days go on without problems.

Attaching a GDB log with (some of) the information requested in IRC by Chris
Wilson. Unfortunately not all variables requested by Chris could be printed
out, due to having been optimized out by compiler.

-- Window manager: WindowMaker 0.95.5
-- chipset: 00:02.0 VGA compatible controller: Intel Corporation 82G33/G31
Express Integrated Graphics Controller (rev 10)
-- system architecture: i686 / 32bit
-- xf86-video-intel: GIT 605fcd9050efc816ac8163e8d626f466d98261c2
-- xserver: X.Org X Server 1.15.1-1 from latest Debian testing
-- mesa: 10.1.2-1 from Debian testing
-- libpixman: 0.32.4-1
-- libdrm version: 2.4.54-1
-- kernel version: 3.14.4 (vanilla+grsec)
-- Linux distribution: current Debian Testing
-- Machine or mobo model: Asus P5KPL-CM
-- Display connector: VGA

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