Xorg freeze after installing 11.04 x64 on Toshiba Satellite A305

I used to have an older version of Ubuntu installed (I think 9.04) and wanted to check 11.04.
I installed using the liveCD while erasing the old installation.

At first the liveCD could not finish boot, ending up with a black screen.
Then I started passing the following boot parameters, which allowed it to open the desktop environment:
acpi=off
noapic
nolapic
nodmraid
nomodtest

I used it to install 11.04 on my hard drive.

Since then, I cannot boot into the ubuntu partition. Neither the normal, nor the rescue option finish boot successfully.

I booted into the liveCD again, chrooted to my hard drive, and ran apt-get update && apt-get upgrade, but it didn't help.

When the computer is stuck during boot, it gives me a black screen, and responds to nothing. No option to get to console, and Caps Lock light isn't responding.

I ran the `ubuntu-bug` utility for sending this bug report on the liveCD, as I currently can't start from the hard drive partition, so I guess it's xorg logs won't show why it couldn't load on the other partition.

I opened a bug (https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/816256) but I haven't been getting any response to it so far.