Andrey: Because you don't use Twinview you should be able to disable it without any side effects (unless you one day do wish to use it). Could you try disabling DynamicTwinView in xorg.conf and reporting back?
Andrey:
Because you don't use Twinview you should be able to disable it without any side effects (unless you one day do wish to use it). Could you try disabling DynamicTwinView in xorg.conf and reporting back?