I probably found my solution: I turned off composite
Section "Extensions" Option "Composite" "Enabled" EndSection
in xorg.conf and generated new one with dpkg-reconfigure xserver-xorg
Since then no freezing again. :-)
I probably found my solution: I turned off composite
Section "Extensions"
Option "Composite" "Enabled"
EndSection
in xorg.conf and generated new one with dpkg-reconfigure xserver-xorg
Since then no freezing again. :-)