edgy->feisty: upgraded hanged at restarting SSH server

[H.S.]

During Edgy-Feisty upgrade: the last line in the update-manager's 
terminal windows says something like restarting openBSD secure shell 
server. Looks like restarting of openssh-server hanged or something went 
wrong here. I can't open a new terminal, can't change to a console and 
neither can I ssh to that machine from another machine to see what could 
be wrong. Any suggestions?

->HS