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I recently installed Ubuntu 13.10 on my laptop and it works pretty well. However, I encountered a problem with my fan that I cannot seem to fix. I tried installing and configuring lm-sensors, thinkfan and control fan, but none solved the issue.

Once I turn my computer on, the fan doesn't run since (perhaps) the temperatures are still low, but once it gets more hot the fan starts running and it doesn't stop ever. I would appreciate any help! Thanks.

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could you share the output of lspci | grep VGA command? The problem may be related to display card. –  numand Feb 6 at 20:59
    
Sure(keep in my I have two GPUs and use bumblebee, but I don't know if this is relevant): 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) –  blancpain Feb 6 at 21:03
    
Since you are using bumblebee, I think display card is nor relevant to the problem. Sorry, nothing comes to my mind now but you can try tlp. –  numand Feb 6 at 21:57
    
I am using tlp, but that doesn't help. I think the problem is that my fan is not detected at all. "sensors" always has the same output for Fan - 0 RPM and "cat /proc/acpi/ibm/fan" always has speed at 0. Not sure what to do with that.. –  blancpain Feb 13 at 8:21

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