Fixed adding this line to /etc/X11/xorg.conf (created with $ Xorg -configure )
Section "Device" Option "AccelMethod" "EXA"
at least, disabling UXA the problem dissapears.
Fixed adding this line to /etc/X11/xorg.conf (created with $ Xorg -configure )
Section "Device"
Option "AccelMethod" "EXA"
at least, disabling UXA the problem dissapears.