Comment 5 for bug 66546

I have an HP dx7300 with the Q965 chipset and I can confirm that this bug exists in the following ubuntu distributions:

6.10 x86 Desktop

6.10 AMD64 Alternate Install

6.06 x86 Desktop

The boot hangs and last message during boot is (similar to):

ACPI: Assume Root bridge [\_SB_.PCI]

Note that Ubuntu is not alone with this problem. All current gentoo livecd fail to boot at the same point.

I also built a bootable USB flash drive to test different kernels. I get the same symptoms with 2.6.20-rc1-mm1.

I have not tried every possible kernel command line option. Switching off APIC and ACPI did not help.