You might want to visit this site: http://en.opensuse.org/NVidia_Suspend_HOWTO
It seems that NVidia is a common threat to s2ram.

Also, in case this also affects intel:
Machines with Intel graphics chipsets often work with "s2ram -f -a3", even when 
using vesafb framebuffer. If "s2ram -f -a3" does not work (for example on Dell 
machines), often "s2ram -f -p -m" works well.
Newer intel Xorg drivers seem to have problems with "-s" (VBE_SAVE), so "-m" 
(VBE_MODE) should be used if at all possible with them. See 
https://bugzilla.novell.com/show_bug.cgi?id=229603 . Generally speaking, 
VBE_MODE is preferable to VBE_SAVE.

-- 
Resuming from s2ram on a Dell Inspiron E1505 causes distorted screen 
https://bugs.launchpad.net/bugs/109833
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Bugs, which is the bug contact for Ubuntu.

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