Sorry guys, Ubuntu now does not start at all on the machine. Get a blinking cursor before GRUB loads. Switching the machine to a permenant LTSP machine. Recovering the ubuntu installation would corrupt the bug. So I think this bug can be closed as no longer reproducable. Unless of course the other person who is affected can do this command for Loïc.
Sorry guys, Ubuntu now does not start at all on the machine. Get a blinking cursor before GRUB loads. Switching the machine to a permenant LTSP machine. Recovering the ubuntu installation would corrupt the bug. So I think this bug can be closed as no longer reproducable. Unless of course the other person who is affected can do this command for Loïc.