GJones wrote:Update: turning on KWin composite effects seems to fix this somehow. Not ideal, but less annoying.
(And apparently composite effects do work decently on machines with Intel GPUs provided the nopat option is passed to the kernel. I wonder if Linux's handling of modern CPUs' PAT capabilities is buggy.)
Composite effects are disabled b/c of intel chipsets having problems. It depends what type of intel chipset someone has. In some intel chipsets system was crashed after enabled composite effects after a while. The problem has to do with KDE 4.5.5 version as well.
If anyone like to enable them has to remove the file /etc/X11/xorg.conf.d/disable-composite.conf and restart X.
If i remember well nopat option did not worked for me. Maybe b/c i have a different intel chip set. Since it worked for you it is good to use it.
In salix-13.37 with KDE-4.7.0 composite effects are working fine without any option is passed to the kernel.