Has anybody else had overheating issues with their laptop? I have an emachines M5309 with an AMD 2500 XP-M CPU, and if I don't have a table fan or something running next to it, it will overheat and shut down if I run mplayer/mencoder for more than like 15 minutes. I have lm_sensors installed, but it cannot detect any of my sensory hardware; so, I would like to know, is there underclocking software available for Linux or something? In windows the fan runs at reasonable speeds but in Linux it's always set to full blast, and that seems kind of weird. Or maybe just get one of those add-on fans that slides under my laptop, do those work? Any advice is very much appreciated, as I'm a newb.