I just installed Ubuntu 13.04 and it seems my fan is working harder and kind of revs up every thirty second or so.
It came with windows 8 pre-installed and when I ran windows it didn't get nearly as hot.
My laptop is an Acer Aspire V3-571G
I've just spent several hours solving the same issue (I also have V3-571G). Finally, I find following "workaround". At least something.
0.) acer_fancontrol Since kernel is neigher able monitoring nor controlling the FAN, therefore we need some other way. There is "a script" >>>for other Acer models<<< which modify UEFI data directly (on the fly) in order to control the FAN speed. http://ubuntuforums.org/showthread.php?t=1748521
I consider this method most dangerous since the program may crash anytime. Moreover, it seems that our model (V3-571G) and/or our BIOS version is not supported.
1.) BIOS upgrade I had BIOS version 2.18. Now I upgraded to (hacked) BIOS version 2.21.
1.1) Page: http://www.bios-mods.com/forum/Thread-Request-Acer-Aspire-V3-571G-Bios-2-21 with latest BIOS for V3-571G model (and some others) that is also "hacked". It simply enables hidden "Advanced" options in Acer's BIOS.
So simply download the BIOS from provided link (at rghost.net site), extract, create bootable USB and upgrade BIOS version on your laptop.
1.2) To make the USB bootable, I used this command
where /dev/sdc is my USB flash drive.
1.3) Flashing procedure is described here: http://www.bios-mods.com/forum/Thread-Request-Acer-Aspire-V3-571G-Bios-1-11?page=11
I followed instruction exactly and it worked.
1.4) Now I've control of FAN speed, based on (just CPU?) temperature. Unfortunately, there are just two values (low and high).
2.) Also don't forget modifying the /etc/default/grub file this way: from this:
You can find several referenced what these arguments do, e.g.: