I've found this for those people with ATI (like me)
Right click desktop
Click Properties
>Advanced
>3D
>OpenGL
>Compatibility
from here you can enable/disable triplebuffering.
Disabled = flicker
Enabled = No flicker.
Right click desktop
Click Properties
>Advanced
>3D
>OpenGL
>Compatibility
from here you can enable/disable triplebuffering.
Disabled = flicker
Enabled = No flicker.