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My laptop is Thinkpad-E430. I installed Ubuntu 14.04. I found it a little overheated， especially around the touchpad area. Then I launched the command "cat /proc/acpi/ibm/fan" to see whether the fan is working. It displays:

status:     disabled
speed:      0
level:      0

Does it mean that the fan is not working? Or the fan is working but not detected?

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It says your fan is disabled, you need to go into your bios and enable it from there, it should work after that.

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  • I have looked it up everywhere, but my bios doesn't have the fan option.
    – sify
    Nov 26, 2014 at 3:01

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