Comment 46 for bug 83290

I can confirm this bug. In my opinion this is a very important issue because it becomes impossible to install or boot ubuntu out of the box on several popular mainboards like asus. This causes a lot of people to abandon ubuntu.

This bug is present when trying to install or boot feisty on a M2A-MVP Asus mainboard.

The only way to install is to add "acpi=off" on grub boot both during installation and next boots.

This causes the computer to be impossible to automatically shutdown because it hangs on "Will now halt" message.

In this MB the sound works using the workaround snd_hda workaround.

We're still looking for a solution, and hearing that this bug is present even if gutsy gibbon earlier versions is not a good news.