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I'm running 13.04 on my laptop. My laptop has a tendency to run really hot - to the point of thermal shutdowns if left unattended for a long period of time. I don't know if that's relevant. the mouse cursor flickers constantly. Sometimes it disappears altogether. The flickering is about 1Hz at rest, but as I do things or type it increases in frequency. It looks like every time the system registers a keypress it flickers. How can i fix this or diagnose what is causing this?

marked as duplicate by Radu Rădeanu, mniess, Warren Hill, Eric Carvalho, Mitch May 19 '14 at 18:39

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I had the same problem. You can fix it manually. Open System Settings > Displays. In the Displays window, you will see an Unknown monitor. Click it and disable it.

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