The subject says it all. If I log onto my Gentoo laptop as root, it hangs
when I log off. This is the debug output of SSH (-vvv) when I try to log
out, if it helps.

debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed

I can't hit C-c or anything to exit it. I have to kill the shell.

Sorry I can't provide more details.

--Geoff Mishkin <gmishkin@comcast.net>

Sorry to be replying to myself, but I meant to say also that if I SSH in
as a regular user, I don't have this problem:

debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug2: channel 0: rcvd close
debug2: channel 0: close_read
debug2: channel 0: input open -> closed
debug3: channel 0: will not send data after close
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
debug3: channel 0: status: The following connections are open:
#0 client-session (t4 r0 i3/0 o3/0 fd -1/-1)

debug3: channel 0: close_fds r -1 w -1 e 6
Connection to 192.168.1.108 closed.
debug1: Transferred: stdin 0, stdout 0, stderr 37 bytes in 1.4 seconds
debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 27.0
debug1: Exit status 0

--Geoff Mishkin <gmishkin@bu.edu>

Geoff Mishkin enlightened us with:
> I can't hit C-c or anything to exit it. I have to kill the shell.

No you don't. Hit [~] and then [?] for help. Make sure you hit ~ after a
newline - hit Enter before that if you're not sure. Doesn't matter
anyway, because the shell isn't responding ;-) Use [~],[&] to background
your ssh session, and [~],[.] to terminate it. Next time, look it up in
the SSH manual page ;-)

Sybren
--
The problem with the world is stupidity. Not saying there should be a
capital punishment for stupidity, but why don't we just take the
safety labels off of everything and let the problem solve itself?