Public bug reported:
Using kubuntu gutsy, AMD64 with nVidia GF6600, using restricted module.
Both konqueror and kate have noticeably more lag than normal in drawing
widgets. Scrolling seems to redraw at about 5fps, whereas both konsole
and firefox have no trouble. glxgears runs at about 2000fps, and moving
windows around the screen looks fine. I am not using beryl/compiz, and
have tried disabling the composite extension in xorg.conf.
Qjackctl is also slow to redraw, so the problem seems to be qt specific,
not kde. Gtk apps have no problems. Might be related to bug 90422 ?
** Affects: ubuntu
Importance: Undecided
Status: New
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kde apps draw very slowly
https://bugs.launchpad.net/bugs/137401
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