Already available since March 20th, I just recently decided to update my Gigabyte motherboard “GA-M55S-S3 (rev 1.0)” with the latest BIOS, which is by the time of writing version “F6”. And – HURRAY, HURRAY – I don’t need to boot Linux with the “noapic” kernel option anymore!! The guys from Gigabyte finally fixed it! So, to everybody who owns the same motherboard I’d recommend updating your BIOS to the latest version. Get the BIOS files from here and follow the instructions from this Gigabyte help page. Good luck!