Mountroot prompt with the new vt(4) console not working.

[Kimmo Paasiala]

I'm not able to use the mountroot prompt with the new vt(4) console on
any of the systems I have, all of them either stable/10 or
releng/10.1. The problem is that I can't type anything at the prompt
or if I can the letters appear as garbage and they come out like one
character every five seconds. Is the mountroot prompt working for
anyone who is using the new vt(4) console?

-Kimmo