As I'm new to this, I don't know of this should be like that or not.
Back story: I managed to install Ubuntu 14.04 (Elementary OS Freya, but this counts as Ubuntu :P) on my UEFI machine (Acer aspire E5-511), after the installation and a restart, I got a Grub Minimal Bash instead of the traditional Grub, so I couldn't boot to Ubuntu, then I managed to repair it. I was so happy to see my new system boot up, it was running well, with 0 driver issues. But the problem appeared after I shut down the notebook: The notebook won't shut down, the system hangs at "System will halt now" with the fan running at full speed. After 3 hours of searching I managed to solve it (blacklisting 2 modules, I don't remember the names cause I just copy-paste the command) and HURRAY!! system shuts down and reboots normally!! Another BUT! When the notebook turns off, I hear a "click" like if I pressed the power button for a few seconds to force shutdown, this doesn't happen with Windows (pre-installed) the notebook turns off without any noise, only happens with Linux.
The question is: Why this "click" happens? Is it harmful to my computer? How can I fix it?
PS: sorry for the bad English :P
Additional information: All packages are updated, no additional drivers found.