https://bugs.freedesktop.org/show_bug.cgi?id=106175
--- Comment #82 from tempel.jul...@gmail.com ---
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: https://github.com/yshui/compton
-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.
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