Comment 14 for bug 990913

I am also having the same issue, mdadm raid 5 (no lvm). Mine is compounded by the fact that the screen is entirely purple... if I reboot while booting and it asks me to choose a kernel, I see the screen 'boot degraded y/n' and then drops to the busybox shell. Interacting with the purple screen as if it were the busybox screen results in a completion of the boot process.
I just upgraded from 11.10, where I did not have this problem.