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    <head>
      <base href="https://bugs.freedesktop.org/">
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - kwin_x11 disabling compositing with mesa 17"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=99604">99604</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>kwin_x11 disabling compositing with mesa 17
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>Mesa
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>17.0
          </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>Other
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>mesa-dev@lists.freedesktop.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>fabio.coatti@gmail.com
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>mesa-dev@lists.freedesktop.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>I gave a try to mesa 17.0.0_rc2 and Kwin (kde plasma 5.8.5) deactivated
compositing with this message:

kwin_core: Failed to initialize compositing, compositing disabled
kwin_core: ShaderManager self test failed

Installing back mesa 13.0.3 the error disappeared and compositing worked again.

System: gentoo linux 
Intel KMS (no Xorg intel driver)
Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
(i5-3427U)
compiler:
gcc (Gentoo 5.4.0-r2 p1.2, pie-0.6.5) 5.4.0
plasma 5.8.5
kernel 4.9.6

I'm not sure if the issue is on mesa or kwin side, however it disappeared by
downgrading mesa.

If more info is needed just let me know.</pre>
        </div>
      </p>


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