My computer has three video cards, six monitors, and (believe it or not) a mouse.
Generally, all six outputs display the correct mouse cursor. Occasionally, the outputs on a random video card will display a vertical series of dots or a 64x64 grid of dots. But when I move the mouse so the cursor switches to another type (i.e. to enter text or resize a window), sometimes it will display correctly. Other times it will display a different series of dots.
If I move the mouse cursor back and forth between outputs of different cards, it changes back to normal after 30 to 50 back-and-forth gestures.
- I've ruled out a defective card, as it's happened on two Radeon X1650s and two Radeon HD4670s.
- I've ruled out the driver as I've used three different versions and the Windows generic video driver.
Why does this happen? How can I fix it?