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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW xf86-video-intel] 2D acceleration slows to a crawl from 4.4.6 -> 4.5"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94980">94980</a>
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<th>Summary</th>
<td>[HSW xf86-video-intel] 2D acceleration slows to a crawl from 4.4.6 -> 4.5
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/Intel
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>rafael.ristovski@gmail.com
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=123011" name="attach_123011" title="Xorg.0.log - full debug">attachment 123011</a> <a href="attachment.cgi?id=123011&action=edit" title="Xorg.0.log - full debug">[details]</a></span>
Xorg.0.log - full debug
When switching from 4.4.6 to 4.5 2D acceleration becomes slow when TearFree is
enabled.
Disabling TearFree fixes this at the expense of having tearing.
3D acceleration is unaffected.
Randomly when moving terminal windows at high speed, small parts of other
windows get "stuck" to the terminal window (might be caused by weird slow
refresh?)
Details:
Whole Xorg stack from git
xf86-video-intel from git
HW:
i7-4500U with HD 4400 Graphics
Running Gentoo</pre>
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