I experienced similar problems with my laptop HP Compaq nc6120 in Ubuntu 14.04. The bug is also present in Debian testing when using kernel 3.13 but not with kernel 3.11. Therefore this seems to be a wider laptop issue and not only Asus-specific and also probably caused by bug in the upstream kernel.
I'm guessing the reason is this upstream regression bug https://bugzilla.kernel.org/show_bug.cgi?id=71711 ** Bug watch added: Linux Kernel Bug Tracker #71711 http://bugzilla.kernel.org/show_bug.cgi?id=71711 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1312860 Title: [Asus A8JP] Fan speed control is frozen To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1312860/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
