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After I wake up my ubuntu from suspend, sometimes I see the screen graphics completely blurred like depicted below. What may be the reason for this & how to rectify this. Running Ubuntu 12.04.4 LTS on a dual boot Win7+Ubuntu PC.

enter image description here

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Do you have a dedicated graphics card or an onboard cpu graphics unit? I'm not sure, but I think I have a similar issue, but only if my graphics card is enabled. –  kelunik Nov 25 '14 at 1:22
I have onboard cpu graphics. When I change the resolution, & then undo-change it, then normal condition is restored. –  user01 Nov 25 '14 at 15:56

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