I have a HP 630 with an i3 processor on which I run Windows 7 64 bit without any problems, I also dual booted Ubuntu 10.04 32 bit I believe, now I upgraded to 11.10 and the clean install doesn't have any apparent problems.

But first thing I update, my Ubuntu won't start it just goes into the purple screen, or more rarely a black screen with a blinking cursor, where it stays indefenetly. The only clue I could find was that when I entered recovery mode the last instruction which appeared on screen before it friezed was:

Booting Node 0,Processors #1

After I tried to install the 32 bit version of Ubuntu 11.10 from a USB stick It froze at exactly the same instruction and wouldn't let me install.

So it's a dual core problem, and maybe a BIOS problem, because it seems that it doesn't want to pass from one processor to another, I added to the grub command line maxcpus=1 and it worked but I don't think it's healthy and it looks like hell.

What is the problem and how do I fix it?