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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 --- - [PNV/SNB/HSW/BYT Bisected]igt/gem_render_copy_redux cause core dumped"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=81159">81159</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>[PNV/SNB/HSW/BYT Bisected]igt/gem_render_copy_redux cause core dumped
          </td>
        </tr>

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

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

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

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

        <tr>
          <th>Reporter</th>
          <td>jinxianx.guo@intel.com
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Other
          </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=102523" name="attach_102523" title="dmesg">attachment 102523</a> <a href="attachment.cgi?id=102523&action=edit" title="dmesg">[details]</a></span>
dmesg

==System Environment==
--------------------------
Regression: Yes. 
Please check the bisect result below.

Non-working platforms: PNV SNB HSW BYT

==kernel==
--------------------------
origin/drm-intel-nightly: 16025dad8e9964a5810385f755d43f1c48d6fdcc(fails)
    drm-intel-nightly: 2014y-07m-09d-14h-17m-14s integration manifest
origin/drm-intel-next-queued: d101c8fe9bda6578ae72d6021415cfaad2b422f0(fails)
    drm/i915: remove i915_rstdby_delays debugfs entry
origin/drm-intel-fixes: 01527b3127997ef6370d5ad4fa25d96847fbf12a(works)
    drm/i915/vlv: T12 eDP panel timing enforcement during reboot

==Bug detailed description==
igt/gem_render_copy_redux cause core dumped

Output:
[root@x-hsw24 tests]# ./gem_render_copy_redux
IGT-Version: 1.7-g8d60b82 (x86_64) (Linux:
3.16.0-rc4_drm-intel-nightly_16025d_20140710+ x86_64)
Subtest normal: SUCCESS
Subtest interruptible: SUCCESS
Segmentation fault (core dumped)

==Reproduce steps==
---------------------------- 
1. ./gem_render_copy_redux


==Bisect results==
----------------------------
commit 6d6dfcfb883818b40b58bac61cc72cab428a7a03
Author:     David Herrmann <<a href="mailto:dh.herrmann@gmail.com">dh.herrmann@gmail.com</a>>
AuthorDate: Sun Mar 16 14:38:40 2014 +0100
Commit:     David Herrmann <<a href="mailto:dh.herrmann@gmail.com">dh.herrmann@gmail.com</a>>
CommitDate: Tue Jul 8 00:34:02 2014 +0200

    drm: enable render-nodes by default

    We introduced render-nodes about 1/2 year ago and no problems showed up.
    Remove the drm_rnodes argument and enable them by default now.

    Acked-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
    Acked-by: Alex Deucher <<a href="mailto:alexander.deucher@amd.com">alexander.deucher@amd.com</a>>
    Signed-off-by: David Herrmann <<a href="mailto:dh.herrmann@gmail.com">dh.herrmann@gmail.com</a>></pre>
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