The laptop (prostar M57U) was working fine with kali 1.10a, so i decided to make an apt-get dist-upgrade, after the upgrade i just try to login and becomes the error. Sometimes it happens in login screen, the screen goes black, the user log out and the hard drive disk activity stop. I have to press the power button to charge the login screen again, and a line appears saying ATA2.01: revalidation failed (errno=2) disappears really quickly. I downloaded the iso of kali 2.0 and make a fresh installation but the error still the same. ATI X1600, 3gb Ram.