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I have installed Ubuntu 11.04 32bit on my Acer 7750g laptop, and very thing works like a charm except the fan which keeps running.

I researched on Google and found that perhaps I need to install lm-sensors. I did very thing according to the relative posts that I had googled. But the result of sensors-detect was only one driver `coretemp'. Then the result of sensors was:

coretemp-isa-0000
Adapter: ISA adapter
Core 0:       +47.0°C  (high = +86.0°C, crit = +100.0°C)

coretemp-isa-0002
Adapter: ISA adapter
Core 1:       +49.0°C  (high = +86.0°C, crit = +100.0°C)

coretemp-isa-0004
Adapter: ISA adapter
Core 2:       +50.0°C  (high = +86.0°C, crit = +100.0°C)

coretemp-isa-0006
Adapter: ISA adapter
Core 3:       +47.0°C  (high = +86.0°C, crit = +100.0°C)

And then I could not go any further.

Question 1: my CPU is intel i7 2630QM, but why only 4 cores are detected?

Question 2: why can't I find sensors of fans?

I have tried with lm-sensors 3.2.0 and 3.3.0. And I have read this , this.

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3 Answers 3

Reset to default
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Your CPU only has 4 cores, but 8 hardware threads (2 per core).

Fan control under Linux is painful. You might like to watch a video of Matthew Garrett from the last LinuxConf AU to understand more of the problems faced by developers. He's the main guy for Linux laptop support from what I understand.

Linky: http://blip.tv/linuxconfau/making-laptops-work-with-linux-4738042

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In my, admittedly somewhat limited experience, many laptops either don't have fan sensors or they are not detected by lm-sensors. Regardless of the cause, the end result is - you can't control fan speeds.

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  • but my laptop works perfectly with Windows 7, i.e., the fan is off when idle or light load.
    – wang.xueqiang
    Jun 19, 2011 at 23:20
  • ...but is there any way to control it's speed in W7?
    – mikewhatever
    Jun 19, 2011 at 23:38
  • I mean windows can, Ubuntu cannot.
    – wang.xueqiang
    Jun 20, 2011 at 12:34
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Try nbfc

Mine is an Acer Aspire E5-573G nothing else worked to control the CPU fan, but nbfc. I'm using Ubuntu 18.04. The exact profile for my model is missing, but nbfc worked fine with another similar profile (Acer Aspire E5-575G). If you don't know which profile to use, you can try: mono nbfc.exe config -r

You will need the latest mono version to build it on Ubuntu 18.04, so don't forget to read How to build NBFC on ubuntu.

Also I edit the default profile to turn the fan policy more agressive.

Good luck.

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