[Bug 106175] amdgpu.dc=1 shows performance issues with Xorg compositors when moving windows

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106175

tempel.julian at gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #80 from tempel.julian at gmail.com ---
It seems like the issue is actually not 100% resolved (linux 5.0-rc1).
The moving of windows is free of stutter now, but moving of windows can still
negatively affect performance of other windows as long as fullscreen vsync is
enabled (not necessarily via compositor, can also be done via TearFree without
a compositor).
Again, this is best seen on https://www.vsynctester.com/ . This seems to happen
mostly when mouse clicks occur, but sometimes also apart from this. It can also
happen when just moving the mouse cursor repeatedly on top of shell elements
which trigger pop ups, like the system tray of KDE Plasma.
As expected, setting amdgpu.dc=0 completely "fixes" the issue.

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