I will try to be as descriptive as humanly possible.

I tried to install Ubuntu on the PS3 and forgot to allocate 10GB for the partition. So commands like "boot-game-os" and such do not work. other things that don't work are holding the power button for 10-15 seconds nor the switch located on the back because upon restart it returns to the Ubuntu install screen.

Basically my main OS is Ubuntu because I screwed up. I don't know what to do, is it possible to undo what I did and get back into my XMB? Should I call Sony? and no I do not have a warranty (yes I know, even dumber)

any ideas?