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        <tr>
          <th>Priority</th>
          <td>high
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [BDW Regression]igt/gem_dummy_reloc_loop/blt causes [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... blitter ring idle"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=76304">76304</a>
          </td>
        </tr>

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

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

        <tr>
          <th>Summary</th>
          <td>[BDW Regression]igt/gem_dummy_reloc_loop/blt causes [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... blitter ring idle
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>major
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>huax.lu@intel.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

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

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

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

        <tr>
          <th>Product</th>
          <td>DRI
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=95982" name="attach_95982" title="dmesg">attachment 95982</a> <a href="attachment.cgi?id=95982&action=edit" title="dmesg">[details]</a></span>
dmesg

System Environment:
--------------------------
Platform: Broadwell
kernel: (drm-intel-nightly)b1859622badb7509586987af5269aa525a0c112f

Bug detailed description:
------------------------- 
run ./gem_dummy_reloc_loop --run-subtest blt, report <3>[  410.576752]
[drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... blitter ring
idle.
It happens on Broadwell with -nightly and -queued kernel.
igt/gem_dummy_reloc_loop/mixed also has this error.

The latest known good commit: b6ae3c7c60161a9b1e15b1ccd6412fad65b7d9cf
The latest known bad commit: b2040f6fed736ccd2319768bc59833abe74148b8

output:
IGT-Version: 1.6-g10571b8 (x86_64) (Linux:
3.14.0-rc6_drm-intel-nightly_b18596_20140314+ x86_64)
running dummy loop on blt
dummy loop run on blt completed
Subtest blt: SUCCESS

Reproduce steps:
---------------------------- 
1. ./gem_dummy_reloc_loop --run-subtest blt</pre>
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