I'm redoing the installation in an effort to get my 7950 to work. I'm on a pretty old GA-X48-DS5 / Core 2 Duo system. I decided to include a custom DSDT (which I'd forgotten last time around when I got the installation to "just work").
The DSDT is basically just an "extract DSDT" + the proper motherboard patch from here: http://olarila.com/forum/packs.php
+ the ALC889A patch from here: http://olarila.com/forum/patches.php.
I put the DSDT in the directory popped up by Pandora.
Now when I boot, I get a KP when booting into the installer (http://cl.ly/OoW5
Also, I noticed that Pandora has put my DSDT in two places (http://cl.ly/OoBC
I don't know if this is intentional or not.
I'm not sure what to make of the ACPI error, so any help at all would be extremely welcome. The forum posts I've read have hinted that it could be RAID related, but I'm not using RAID so that can't very well be it.