Stefan, is this on real hardware or in a VM? Can you attach the /proc/cmdline used?
Is plymouth itself still running at this point? even with upstart banging on the cpu like this, it shouldn't take too long for the boot sequence to finish and plymouth to stop, at which point the bridge should also go away... but it doesn't sound like that's what happened to you.
Stefan, is this on real hardware or in a VM? Can you attach the /proc/cmdline used?
Is plymouth itself still running at this point? even with upstart banging on the cpu like this, it shouldn't take too long for the boot sequence to finish and plymouth to stop, at which point the bridge should also go away... but it doesn't sound like that's what happened to you.