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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - amdgpu.dc=1 shows performance issues with Xorg compositors when moving windows"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106175">106175</a>
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<th>Summary</th>
<td>amdgpu.dc=1 shows performance issues with Xorg compositors when moving windows
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>DRM/AMDgpu
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
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<th>Reporter</th>
<td>tempel.julian@gmail.com
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<pre>Created <span class=""><a href="attachment.cgi?id=138987" name="attach_138987" title="dmesg">attachment 138987</a> <a href="attachment.cgi?id=138987&action=edit" title="dmesg">[details]</a></span>
dmesg
When amdgpu.dc=1 and an Xorg compositor are enabled at the same time, there is
stuttering when moving windows.
It's most visible with Compton (which is completely stutter-free when
amdgpu.dc=0), but also KWin and to a lesser extent also Gnome-Mutter.
It happens also with GPU clocks forced to maximum, so it doesn't seem to be a
powersaving issue.
In the recent past, there was an issue with performance degrading when
amdgpu.dc=1 and an Xorg compositor are enabled and the hardware mouse cursor
was used, maybe it's still related (just guessing though)?
Tested with Linux 4.17 RC1 and drm-next-4.18-wip (4.16.1.52132fd03)
xorg-server 1.19.6+13+gd0d1a694f (amdgpu DDX & modesetting)
RX 560</pre>
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