Public bug reported:
Binary package hint: xorg
Booting the install disk is only possible if "nomodeset" is selected on
startup. It is possible to install, but when I boot the installed
system I can't even get to the desktop to install the fglrx drivers. The
system hangs with an ACPI error message on the console.
The motherboard is advertised as capable of supporting crossfire, and my power
supply is certainly hefty enough, (1000W) but the configuration fails to boot.
I can get a bit further if I enable "nomodeset" on grub after the install, but
the system then hard hangs with a couple of a messages something like:
[Radeon ####:0000 ACPI error] The same thing happens if I boot the rescue
system.
I am able to install normally if I remove one of the HD5970 cards.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
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Cannot boot with 2xHD5970 in crossfire on GA-X58A-UD7 motherboard
https://bugs.launchpad.net/bugs/678148
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