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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [BSW Regression]Run Cairo Performance case will result GPU HANG: ecode 8:0:0x85dffffb, in X [4370], reason: Ring hung"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89936">89936</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[BSW Regression]Run Cairo Performance case will result GPU HANG: ecode 8:0:0x85dffffb, in X [4370], reason: Ring hung
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>DRM/Intel
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>wendy.wang@intel.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>intel-gfx-bugs@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=114914" name="attach_114914" title="GPU_HANG_dmesg_cairo_case">attachment 114914</a> <a href="attachment.cgi?id=114914&action=edit" title="GPU_HANG_dmesg_cairo_case">[details]</a></span>
GPU_HANG_dmesg_cairo_case

System Environment:       
--------------------
Failed Platform: Braswell
Kernel Regression: Yes, 
but cannot bisect because of the bug between the good and bad commit.
89350 [BSW bisected] kernel fails to start up

Kernel:
Good commit: drm-intel-nightly branch 2015-02-10 kernel
Bad commit: drm-intel-nightly branch from 2015-03-10 to the latest kernel
commit

Description:
Run cairo performance, check dmesg will see GPU HANG error message:
GPU HANG: ecode 8:0:0x85dffffb, in X [4370], reason: Ring hung, action: reset
[  119.815835] [drm:i915_reset_and_wakeup] resetting chip
[  119.815956] [drm:i915_context_is_banned [i915]] *ERROR* gpu hanging too
fast, banning!
[  119.817187] drm/i915: Resetting chip after gpu hang

Dmesg file has been attached.

Reproduce Steps:
1. cd /home/cairo/perf 
2. vblank_mode=0 CAIRO_TEST_TARGET=xlib ./cairo-perf-trace
/home/cairo-traces/benchmark/firefox-chalkboard.trace</pre>
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