Bad graphics performance under KDE: Difference between revisions
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[[Category:Knowledge_Base|Graphics, bad performance, KDE]] | [[Category:Knowledge_Base|Graphics, bad performance, KDE]] | ||
Revision as of 18:45, 6 March 2012
Problem
When starting Flightgear under KDE, the graphic performance is very bad, i.e. low framerates.
Reason
It is likely that "compositing" is activated. KDE includes a large number of various effects which use OpenGL. This degrades the performance of applications that use OpenGL heavily.
Solution
Disable compositing permanently or temporarily in the KDE settings, via the assigned hotkey (normally Shift + Alt + F12) or via a script.
Caveats
With compositing disabled, KDE desktop effects don't work anymore.
Example
This example by i4dnf deactivates compositing, starts Flightgear and reactivates compositing after Flightgear ended.
#!/bin/sh
qdbus org.kde.kwin /KWin toggleCompositing && /usr/games/bin/fgfs $@ && qdbus org.kde.kwin /KWin toggleCompositing