Try disabling sync to vblank. Install compizconfig-settings-manager, go to System->Preferences->Advanced Desktop Effects, go to General Options, Display Settings tab, and uncheck the option there.
Does that help?
Try disabling sync to vblank. Install compizconfig- settings- manager, go to System- >Preferences- >Advanced Desktop Effects, go to General Options, Display Settings tab, and uncheck the option there.
Does that help?