I just bought this notebook and I've already installed in a new partition Ubuntu 12.04 LTS with 6GB of swap memory.

UPDATE2:

This is the laptop configuration: http://h10025.www1.hp.com/ewfrf/wc/document?cc=it&lc=it&dlc=it&tmp_geoLoc=true&docname=c03397517

Sometimes (without any special conditions) Ubuntu freezes.
My mouse is blocked, the UI is blocked, Alt+F1 to kill something or to restart is blocked, I can't really do anything...

I've also tried and it freezes with:

• Ubuntu 3D


• Ubuntu 2D


• GNOME Shell

and it freezes both with low and high load.

I can only press the power button (physically) and restart my laptop (and this is not the correct way to do things).
I'm using this laptop for work, so I need a stable OS without this freeze.

Someone knows how to solve this problem?

UPDATE:

• /var/log/messages is empty


• /var/log/kernel.log -> http://paste.ubuntu.com/1220182/


• /var/log/Xorg.0.log -> http://paste.ubuntu.com/1220186/

I just installed the proprietary driver from ATI, but it crashes anyway. This morning I started the laptop, I enabled wireless, opened Dropbox and Chrome -> freeze.

When it freezes I cannot:

• Do Ctrl+Alt+F1 to get console access


• Alt+F2 + r to reload session


• Alt+Print Screen + RESUB to restart

It is totally frozen.