Am Freitag, den 16.10.2009, 07:18 -0300 schrieb Fernando Cassia: > 2009/10/16 Christoph Höger <[email protected]>: > > 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.
My fan-o-meter tells me it's at 0 RPM - that's what I'd call idling. Strange thing is: I think the controller of that fan is in "learning mode". In the early days, it used to prevent 50°+ at all cost, now it even sometimes does not run at 53°. Is that some kind of ageing?
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