2009/10/16 Christoph Höger <choeger@xxxxxxxxxxxxxxx>: > Am Donnerstag, den 15.10.2009, 17:34 -0500 schrieb Mikkel: >> Christoph Höger wrote: >> > Hi, >> > >> > I just wondered why my fan always runs after a while. After closing >> > firefox (which took 50% cpu along with X) I now have a load of roughly >> > 0.06 - barely nothing computed at all. Both cores are in the lowest >> > config and yet my cpu temperature goes from 42°C to 47°C in roughly 2 >> > minutes (and back by fan activity). >> > >> > I would understand this if there was some load, but what causes my CPU >> > to heat if it does nothing? Design failure? Has anybody seen such a >> > thing? >> > >> > regards >> > >> > Christoph >> > >> When was the last time you cleaned the dust out? Also are the air >> vents on the laptop clear when in use? > > I am aware of that dust thing (I am going to give a compressor a try), > but the heat goes up when the notebook and the fan is idle. That should > not have anything to do with dust, right? When computers are idle (but active, I mean NOT hibernating or suspended) it doesn´t mean the CPU fan stops completely. Sometimes those spin at very low rpm so you don´t "hear" it, but the fan IS spinning, albeit at very slow speed. If there´s dust inside the heatsink system, the fan spins slowly, but air doesn´t move inside, because of the dust. Hence temperature builds up until it reaches a certain threshold, which is when the system-bios increase fan speed to lower the temperature. Here´s what a totally clogged up notebook fan-heatsink looks like. http://img147.imageshack.us/img147/808/heatsinkuy8.jpg Obviously this is an extreme case. But that´s what it gets to eventually if you never blow compressed air to clean the very thin ducts inside. FC -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
