Fix Acer Aspire ONE Ubuntu "Freezing" Issue (Ubuntu 14.04, 16.04)

Previously, I was looking at Official Ubuntu help page for Acer Aspire series for help but it didn't really work at all. It told us to set the following:

intel_idle.max_cstate=3

I have turned to add the following option to the boot parameters to solve system freezing when the power is connected:

intel_idle.max_cstate=1

Just add it to the GRUB_CMDLINE_LINUX_DEFAULT string in /etc/default/grub.

$
$
$ sudo update-grub
$ sudo reboot now
$
$

c_state = 1 makes CPU running at full power and not falling asleep anymore. It's such a power hunger setting for battery life but it fixed the random freeze issue.

For more advanced option of C state which may suits different CPUs categories. Please check:
http://www.hardwaresecrets.com/everything-you-need-to-know-about-the-cpu-c-states-power-saving-modes/