[Bug 88777] New: GPU hang (ring hung) with chromium and OpenGL composite manager on Intel 965GM

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88777

            Bug ID: 88777
           Summary: GPU hang (ring hung) with chromium and OpenGL
                    composite manager on Intel 965GM
           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: barbieri at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 112778
  --> https://bugs.freedesktop.org/attachment.cgi?id=112778&action=edit
dmesg.txt of kernel with drm.debug=0xe

I've noticed this bug to be reproducible on my system even after recent updates
to xorg and mesa.

My system:
 - MacBook 4,1 (Intel(R) Core(TM)2 Duo T8300, video card is 965GM)
 - ArchLinux (kernel 3.18.2-2-ARCH x86_64 SMP PREEMPT)
 - Package versions:
    * xorg-server: 1.16.3-2
    * xf86-video-intel: 2.99.917-1
    * libva-intel-driver: 1.5.0-1
    * libva-mesa-driver: 10.4.2-1 
    * mesa: 10.4.2-1
    * libdrm: 2.4.59-1
    * enlightenment: 0.19.2-1 
    * slim: 1.3.6-5
 - Window Manager: Enlightenment 0.19.2 running OpenGL compositor (also happens
with GNOME3, but that often crashes earlier)
 - Login Manager: slim (shouldn't matter but...)

Steps to reproduce:
 1. Login to enlightenment using its OpenGL composite manager;
 2. Visit Chrome Themes page
https://chrome.google.com/webstore/category/themes?hl=en
 3. GPU hungs

See attached logs:
 * dmesg.txt: kernel booted with drm.debug=0xe
 * drm_card0_error.txt: /sys/class/drm/card0/error, same as
/sys/kernel/debug/dri/0/i915_error_state

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