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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - amdgpu.dc=1 shows performance issues with Xorg compositors when moving windows"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106175#c82">Comment # 82</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - amdgpu.dc=1 shows performance issues with Xorg compositors when moving windows"
href="https://bugs.freedesktop.org/show_bug.cgi?id=106175">bug 106175</a>
from <span class="vcard"><a class="email" href="mailto:tempel.julian@gmail.com" title="tempel.julian@gmail.com">tempel.julian@gmail.com</a>
</span></b>
<pre>Could you please try the following?
-disable Plasma compositing with Ctr + Alt + F12 (or in the compositor settings
and log out and in again)
-get the latest Compton release by yshui: <a href="https://github.com/yshui/compton">https://github.com/yshui/compton</a>
-start Compton (Mesa still enables vsync automatically in the latest release,
this has changed with compton-git)
-open a Dolphin window and www.vsynctester.com in webbrowser
-now click Dolphin's title bar, move it a bit, release it and repeat the
procedure several times in a row
-there should be stutter happening in the vsynctester.com browser window
-now quit Compton and start it with "vblank_mode=0 compton" to enable GLX
compositing without vsync
-now the repeatedly moving Dolphin's window procedure described above shouldn't
lead to any stutter
-when booting with amdgpu.dc=0, there also shouldn't be any stutter when vsync
is kept enabled
My layman impression is that this indicates the problem originating somewhere
in the xorg/driver space, and not in Plasma or the compositor.</pre>
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