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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 - [IGT][BAT] igt@kms_busy@basic-flip-[a|b] warn igt-kms-WARNING: Output DP-2 could not be assigned to a pipe"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=105724">105724</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[IGT][BAT] igt@kms_busy@basic-flip-[a|b] warn igt-kms-WARNING: Output DP-2 could not be assigned to a pipe
          </td>
        </tr>

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

        <tr>
          <th>Version</th>
          <td>DRI git
          </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>elizabethx.de.la.torre.mena@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>
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        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=138327" name="attach_138327" title="dmesg log">attachment 138327</a> <a href="attachment.cgi?id=138327&action=edit" title="dmesg log">[details]</a></span>
dmesg log

Since 4.16.0-rc6 commit-141def2+ we are seeing this igt warn with test:

igt@kms_busy@basic-flip-a
igt@kms_busy@basic-flip-b

Stdout  
IGT-Version: 1.22-g94e8862 (x86_64) (Linux:
4.16.0-rc6-drm-intel-qa-ww12-commit-9d737ce+ x86_64)
Subtest basic-flip-A: SUCCESS (1.221s)
Test requirement not met in function igt_display_require_output_on_pipe, file
igt_kms.c:2014:
Test requirement: !(pipe >= igt_display_get_n_pipes(display))
Pipe C does not exist.
Test requirement not met in function igt_display_require_output_on_pipe, file
igt_kms.c:2014:
Test requirement: !(pipe >= igt_display_get_n_pipes(display))
Pipe D does not exist.
Test requirement not met in function igt_display_require_output_on_pipe, file
igt_kms.c:2014:
Test requirement: !(pipe >= igt_display_get_n_pipes(display))
Pipe E does not exist.
Test requirement not met in function igt_display_require_output_on_pipe, file
igt_kms.c:2014:
Test requirement: !(pipe >= igt_display_get_n_pipes(display))
Pipe F does not exist.
Stderr  
(kms_busy:3713) igt-kms-WARNING: Output DP-2 could not be assigned to a pipe</pre>
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