Linking to bug 569122 - might be related.
Can you provide a screenshot / photo of the distortion?
** Changed in: xserver-xorg-video-nouveau (Ubuntu)
Status: Confirmed => Triaged
** Changed in: xserver-xorg-video-nouveau (Ubuntu)
Importance: Undecided => Medium
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Video mode corrupted after resume from suspend to RAM
https://bugs.launchpad.net/bugs/568310
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