<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GTK] Tearing when entering AC mode"
href="https://bugs.webkit.org/show_bug.cgi?id=150955#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [GTK] Tearing when entering AC mode"
href="https://bugs.webkit.org/show_bug.cgi?id=150955">bug 150955</a>
from <span class="vcard"><a class="email" href="mailto:agomez@igalia.com" title="Andres Gomez Garcia <agomez@igalia.com>"> <span class="fn">Andres Gomez Garcia</span></a>
</span></b>
<pre>As commented, I hit similar problems while browsing but we wanted to check what would happen when forcing AC compositing. Therefore, we can do that by launching epiphany like:
$ WEBKIT_FORCE_COMPOSITING_MODE=1 epipahny
So, steps that I followed:
1. Launch a new and fresh epiphany instance
2. Open this bug directly from the location bar
3. Open in a background tab the link <a href="https://github.com/WebKit/webkit/commits/master">https://github.com/WebKit/webkit/commits/master</a> by using the secondary button of the mouse and clicking in the link in <a href="show_bug.cgi?id=150955#c0">comment 0</a>.
4. Move to that new tab
The outcome when forcing or not forcing the compositing mode is quite different.
Without forcing, there is nothing remarkable to comment.
With forcing:
1. We experience some tearing straight away after launching epiphany, upon the creation of the window. It is a quick flickering that is promptly redrawn by epiphany's content.
2. On moving to the second tab opened in the background we experience again some tearing. Its severity changes from running session to running session. Sometimes is just a quick flickering but, others, we can see quickly a complete screenshot from some other previously opened epiphany tab or other application. Also, sometimes, the tearing is complete garbage that it is not redrawn until we force it by scrolling in the new tab.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>