I am new to Linux. I have a Dell Inspiron 15 with a 1st generation Intel Core i3 and Ubuntu 12.10.
My laptop gets heated quickly which doesn't happen on Windows. Also the battery is discharged faster than in Windows. Please help.
most probably installing the correct VGA driver can reduce overheating. To install correct VGA driver
you need to do some simple things if your using ubuntu 12.10
Most probably, it is due to having several graphic cards enabled simultaneously, usually intel + (Nvidia | ATI). I have this same problem.
You can try to disable one of the graphic cards. You could find additional information in this blog dedicated to Linux hybrid graphics.