I also had problems with suspend/Resume on my LG T1 Express dual laptop with 
the new 12.04 release. The first time i tried to suspend it did without any 
problems, but after i was unable to suspend it due to some problem with my TPM 
chip.
What i did was to manualy unbind or unload the tpm_tis driver using the 

sudo modprobe -r tpm_tis

After all the suspend/Resume did function without any problem.

SO i still don't know why this module is creating problems with the
suspend action only at the second try, but at least this hack helps to
suspend and resume without hiccups :)

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https://bugs.launchpad.net/bugs/989674

Title:
  Ubuntu 12.04 i386 does not reboot back Unity from suspend

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