I have realized the problem is a kernel PAE presents in testing's installation. In fact i have installed a minimal squeeze with kernel 2.6 and the laptop has working well; than i have upgraded to wheezy and the debian installer installed the kernel 3.2...PAE. When I had rebooted Debian at end of upgrade, i had selected the new kernel and then the boot crashed. I have rebooted the laptop and i selected the old kernel, then i removed kernel PAE and i installed another kernel, the linux-image-3.2.0-2-4. With this kernel the laptop works correctly.
Best regards, Daniele
