FWIW:
I am running Ubuntu Intrepid, released version, on my F762NR Compaq. I have had the same issue, but after a little searching on the net, I found a workaround.
I was able to add 'acpi=noirq' to the kernel boot command line, and the computer boots normally. So, you would have something like 'quiet splash acpi=noirq' on that line in the boot menu.
FWIW:
I am running Ubuntu Intrepid, released version, on my F762NR Compaq. I have had the same issue, but after a little searching on the net, I found a workaround.
I was able to add 'acpi=noirq' to the kernel boot command line, and the computer boots normally. So, you would have something like 'quiet splash acpi=noirq' on that line in the boot menu.
Give that a try...