2009/10/16 Christoph Höger <choeger@xxxxxxxxxxxxxxx>: > Am Freitag, den 16.10.2009, 07:18 -0300 schrieb Fernando Cassia: >> 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. > > 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? It´s probably stuck in dust. The board is likely sending a low voltage but the fan doesn´t yet "start" because of all the dust it´s got around it. The fan monitor shows the TRUE voltage revolutions (that´s why cpu fans need 3 wires, two send voltage for it to spin and the other reports back every spin of the motor-blades), not the voltage it´s being sent to make it spin. (the board could be sending full voltage to make it spin at max speed, at yet the cpu fan meter would show 0 rpm, if the fan is stuck in dirt or you placed your finger on top of it to make it stop). I guess you know what I mean... in other words: blow some compressed air from a decent air compressor (as I said cans do not have equal airflow power) into the cpu air exhaust vents at the back of your lappy. If you hear the internal cooler hum (it´s likely spinning backwards due to the reverse airflow), it means it´s working. After 3-4 seconds stop. Also move from side to side to cover all the sections of the air exhaust vents. You will likely get a nice cloud of dust expelled by the cooler... so don´t do it near food or clean clothes... I always place the notebook on a ceramic-cement-wood floor (never carpeted) while doing this procedure. Makes cleaning up easier. 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
