Tablet shuts down on wake, only in battery mode.
 

I've got a portege m200 and it works great, suspend to ram and everything, problem is, when not powered by mains, it shuts down after a suspend to ram. I guess this has got something to do with the settings where the pc shuts down when the batttery level is critical, and the computer sending a wrong signal when it wakes. What file or setting should I change to either get a delay, or remove the conflicting option?