I am using Ubuntu 11.10 AMD64 on my Toshiba laptop (L505D-S5965). After I boot into the OS, my fan works perfectly being mostly quiet. Recently, I noticed that whenever I resume from system suspension, my fan starts to become noisy. This happens consistently without any programs or processes running at all. It will keep being noisy until I reboot my computer, then it goes back to normal. When the fan is noisy, the CPU temperature is 53°C, which is not hot at all. I've tried booting with pcie_aspm=force
in the GRUB options file, but that did not work. Is there a fix?
Linux – Ubuntu/Toshiba Fan Speed Issue
fanlaptoplinuxUbuntuubuntu 11.10
Best Answer
This is a known bug in Ubuntu, dating back to 2006 :
Bug #77370 : Laptop Fan always on after resume from suspend to RAM.
The above is a very long thread going on for 6 years, concluding that this problem happens on some kernel versions, but not on all.
Some solutions were listed, going from unplug/replug the power cord to creating a script to run after resume to stop the fan.
The script in question is created as file
/etc/pm/sleep.d/99fancontrol
(remember to chmod 755) :