I get the same BIOS Bug error message when trying to install Edgy. Dapper booted and installed fine though. My motherboard is an Asus P5B, with the Intel P965 chipset.
-- Does not boot on HP dc7600 USDT (regression from dapper) https://launchpad.net/bugs/58489 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs