I changed something in the BIOS which causes a kernel panic, if my card is installed (Ultra ATA/133 PCI-to-ATA Host Controller).

I had it working fine til a month ago, when I installed some Linux on a HD on that card. That booted fine too, and I did some disk switching.

Still all was well, but yesterday I tried to boot XP (2nd IDE master)(GRUB is Ubuntu/2nd IDE slave), and XP wouldn't load. I clicked here, and clicked there, and now XP and Ubuntu boot, ONLY if the RAIDbus card is OUT.

Put the card in, and I get a kernel panic/lockup.

This HAS to be a BIOS function - nothing is different on the disks, including GRUB menu. Help me get it back?

Yup, it's BIOS alright, and it has a dependency.

The dependency is a jumper pin for the harddisk. BIOS enumeration depends on jumper pins. http://http.cdnlayer.com/lq/images/q..._lq/icon11.gif