Posted 22 February 2012 - 09:55 PM
I think you'll have to research how the Xbox uses a bootloader to find an OS. It may instead of having a free-loader, have an Microsoft-Xbox-only-OS loader instead, essentially it isn't going to be easy to do anything if they flashed Xbox "BIOS" to only accept Xbox stuff. I think you would need a mod chip, or you would need to find out how to flash back the chip. Maybe, just maybe you can clean out your HDD, and put on an old version of Xbox, and do updates before 2009, and hopefully there is a flash in those updates somewhere which will wipe out the 2009 flash (presuming the 2009 "update" included a hardware flash.)
If there is no hardware flash it should be possible to load linux/ubuntu/etc, you just need to find someone or find out yourself how to make the Xbox look and be ok with loading Linux, most likely by acting like a fake Xbox code of some sort.
I may be wrong, but this is my input. (I have merely CompTIA A+ certification.)