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      <base href="https://bugs.webkit.org/">
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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 - [WPE][GTK] Accelerated compositing mode is in poor state on trunk"
   href="https://bugs.webkit.org/show_bug.cgi?id=192523">192523</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[WPE][GTK] Accelerated compositing mode is in poor state on trunk
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

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

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>WebKit Gtk
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>mcatanzaro@igalia.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bugs-noreply@webkitgtk.org, magomez@igalia.com, zan@falconsigh.net
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Unfortunately accelerated compositing mode has suffered some regressions between 2.22 (where I believe it was working *almost* well enough) and 2.23.1. I've made the executive decision to disable AC mode in Epiphany git master since this fixes several issues, including annoying issues with GitLab that were making development difficult. I'll leave it enabled in 3.30 for a while longer because 3.30 branch users are expected to use 2.22, but when we get closer to 2.24 release I'll go back and disable it there too.

Here are the issues:

 * <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - [GTK] Artifacts while browsing Google+ in accelerated compositing mode"
   href="show_bug.cgi?id=178387">Bug #178387</a> (an old bug, but I do not remember hitting it in 2.22)
 * <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - Make sure we never create a WebSWClientConnection with an invalid sessionID"
   href="show_bug.cgi?id=182276">Bug #182276</a> (seems like a recent regression)
 * <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION(2.23.1): [GTK] Garbled rendering on GitLab"
   href="show_bug.cgi?id=192230">Bug #192230</a> (seems like a recent regression)
 * <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [GTK] Window shadows broken in AC mode with amdgpu or noveau graphics"
   href="show_bug.cgi?id=192522">Bug #192522</a> (not a regression from 2.22, but a blocker for Epiphany regardless)

I'm also tracking this as <a href="https://gitlab.gnome.org/GNOME/epiphany/issues/595">https://gitlab.gnome.org/GNOME/epiphany/issues/595</a>.</pre>
        </div>
      </p>


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