KM I do see the mouse cursor dithering effect while the graphics driver was still installed. With the graphics driver installed there is still the screen-wide flicker in addition to the mouse cursor dithering effect. Once the driver is uninstalled, the mouse cursor flicker effect is the only one that remains. Interestingly, My Macbook air has the same situation. Screen fciler and mouse cursor flicker. The only thing is on mac, when some web pages load it effects the screen and it restarts. It is usually with popups from websites or apps, or with carousel/canvas type effects on web pages.
I am dead scared to start using the external monitor (Non-led LCD) again, as even though I deleted the driver, I really dont want to trigger a migraine! I suppose I will just have to bite the bullet and try.