I have installed Ubuntu besides Windows7 on my laptop (Vaio Sony VPCEA15FG). I can work with Windows for several hours without any problem; but as soon as I log into Ubuntu, my CPU overheats to 80C and turns off after less than 5 minutes. Any idea how can I solve this problem?
have you considered jupiter?
also, when you run the system monitor, is your CPU percentage high? (on some ubuntu versions I've had issues where things like software centre would use 100% cpu and my laptop would switch off in a few minutes)
Hope this helps!