Comment 17 for bug 41301

First, it's rated medium because it doesn't affect very many of us. Another reason it's not rated higher is because there is a workaround. The workaround is to edit the /boot/grub/menu.lst file. Add "noapic acpi=off" to the end of the root line. You can do this while booting just by hitting e when the boot menu appears. Then select the root line and hit e again. Go to the end of the line and add the command. Hit return to save the edit and then b to continue the boot process.

Editing it during boot makes the command happen on booting, but only for that session. If it solves the problem you can add it to the end of the line by editing the /boot/grub/menu.lst file. From a command line enter "sudo gedit /boot/grub/menu.lst." When Gedit comes up add the command to the end of the line and save the file. Now it will be permanent.

The above fix worked for me on Fedora 7, Debian Etch and Ubuntu Feisty, all 64-bit. I have since discarded the others and now use just Ubuntu Feisty amd64.