Hello Dears,
I have an K50IN ( Asus ) laptop
I try to install ubuntu ( 10.10, 11.10, 12.04). Unfortunately, I have same problem for all of them ( even when I boot them from CD or USB(live)) .
When I want to restart my computer, it freezes and I have to use power button to shut it down.
(Even I want to install NVIDIA developer Deriver when I run command
sudo /etc/init.d/gdm stop
It is frozen, too. And I cannot install it )

I surf the net and I use some suggestion like this page , which I reinstall my wireless network driver, but none of them work for my problem

Is there any suggestion?

Thank all of you in advance.