I’m using these instructions to update motherboard bios on a machine that runs linux:

http://liquidat.wordpress.com/2007/05/20/howto-update-bios-on-linux/

Here’s a recap:

  1. Download Freedos full cd
  2. Put driver on USB drive
  3. Boot up and execute driver’s exe file

Warning: updating your bios could break your computer. I don’t take any responsibility for your actions!