Cannot shutdown my Sony Vaio

Solved by doing the following:

I've rolled back the grub file as it was originally (only quiet splash option), then:

update-grub
sudo apt-get install fglrx-updates
sudo aticonfig --initial
update-grub

Looks like that installing ati driver from the ubuntu driver update GUI is not a smooth process.

Mybe wrong to post it as an answer but i wanted to add an image:

with my Thinkpad T 500 shutdown hangs after aptitude install fglrx-updates fglrx-amdcccle-updates.

I needed to change BIOS settings like this:

and then i ran

sudo update-grub
sudo apt-get install fglrx-updates
sudo aticonfig --initial
sudo update-grub

It worked for me.