Yea sounds to me like the problem [WebCarnage] suggests, youll probably need to find some script and edit it i assume so that is shuts down only when it reachs a desirable threshold. I dunno whether this is of any use http://www.xs4all.nl/~bsamwel/laptop...ols/index.html but theres some stuff on there about linux on laptops, might be worth a read.

i2c