[jacquesm]

I've had this problem too, in my case it was caused by some clever (way too clever imo) stuff going on that tries to write a bunch of io ports to a safe place on suspend and writes that data back to the various chips on resume. This caused all kinds of trouble.

If your BIOS supports it choose 'sleep' rather than 'hibernate' for suspend/resume. It will be a bit slower but there is far less OS dependent magic going on under the hood.