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This is what I get in the login screen, it disappears only when I move the mouse and it only happens in the login screen.

screen corruption

This is Ubuntu 12. 04 running over an Intel desktop board DG31PR and I'm using the onboard video.

Any help will be appreciated.

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closed as too localized by James Henstridge, James Aug 14 '12 at 1:03

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Do a check on you VGA cable. – Mitch Jul 27 '12 at 16:07
>.< facepalm here, actually it looked well connected when i checked but regardless of that i adjusted it even more and that resolved the problem, thank you! – carrizo Jul 30 '12 at 1:55
up vote 1 down vote accepted

Ok this is embarrassing, it was just a slightly loose cable as suggested by Mitch, but anyway this could help someone with the same problem to realize that maybe it is not a driver/system/configuration problem.

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