Also of note, I am able to boot both Debian stable and testing with no problems in both DVD and USB installs without unplugging any drives. This implies it is a specific issue to the Ubuntu kernel since it only effects Ubuntu based distros. I can confirm Mint has the same issue. I've had this problem on Mint and Ubuntu Main since 13.04.
Also of note, I am able to boot both Debian stable and testing with no problems in both DVD and USB installs without unplugging any drives. This implies it is a specific issue to the Ubuntu kernel since it only effects Ubuntu based distros. I can confirm Mint has the same issue. I've had this problem on Mint and Ubuntu Main since 13.04.