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I have a very strange problem. Sometimes when I work a long time with my laptop while the desktop is hidden a strange thing happens. I show the desktop and it is all scrambled.

enter image description here

This problem is all the stranger since it happens only sometimes and I did not have it always.

How can I diagnose whether it is a hardware or software problem? Has anyone had similar symptoms?


This problem persists after upgrading to 13.10.

When the wallpaper gets scrambled and I change it to a different one and then back again, it seems fixed for a while. Does this fact indicate that it is not a hardware problem?


Now this happens also for some windows, not just the desktop.

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Does it happens to wallpapers only ? – Varun Das Dec 10 '13 at 12:00
@VarunDas sofar yes – Martin Drozdik Dec 10 '13 at 12:05

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