Fan suddenly starts after wake-up

I have a Dell Vostro with an Intel i7-3612QM processor. I installed i8kutils and the service i8k.service is properly started during booting. That resolves in properly adjusting the fan according to the temperature.

But if I close the lid and wake up the computer later - apart everything working as expected - after some time the fan starts spinning at the highest level and doesn't stop. Normally, the fan runs at that high speed if I watch HD movies or HD streaming via flash: The temperature is really hight at this point. But after waking it up, it does not wait for that threshold to start spinning.

My current workaround is starting i8kmon --auto, manually setting the speed to 1 and then 2 and then to auto, and the fan finally slows down.

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When the fan starts to run, use the htop command to see if there's a process eating CPU. You may have to install the command first. Also note that if the fan is running quicker because a process is using the CPU, manually lowering the fan rate can damage your processor since the heat isn't being dissipated well enough. Please be careful.

( 2014-08-28 11:05:33 -0600 )edit

There is no indication if a process goes crazy. Under normal circumstances (that are: no prior waking up from hibernating) the fan works as intended and runs high if there is heavy load like the flash player ( :P ). But this problem occurs random - at least to me without any indication. The fan just starts to run at highest speed and never slows down until a restart or the method mentioned in the question. In my eyes, this has nothing to do with CPU load or temperature.

( 2014-08-29 07:23:49 -0600 )edit

Is there a chance that this could be a firmware problem? The firmware is malicious or buggy.

( 2016-01-21 08:41:03 -0600 )edit

Of course, with software bugs nothing can be ruled out. Please elaborate on how I can determine that.

( 2016-01-21 10:35:17 -0600 )edit