[FreeNX-kNX] nxagent session gets lost, user gets new session even though one already exists

[Mario Becroft]

I have one user with a Windows Vista laptop who has a particular
problem:

He has a session open, then suspends his laptop by closing the lid, but
without first terminating his nx client. Later, he unsuspends his
laptop. At this point his nx client pops up with the dialog saying that
the connection to server was lost, and do you want to terminate the
session? He selects Yes. Then he starts up the nx client and logs in,
expecting to resume his existing session, but instead he gets a new
session.

His old nxagent is still running, but he now has a second, new nxagent
process.

This happens even though SESSION_USER_LIMIT is set to 1.

The old nxagent is lost, in the sense that it does not show up in
"nxserver --list" and there is no way to login to it. Aside from that,
though, the old nxagent is apparently running fine. There does not
appear to be anything wrong with nxagent itself, it looks more as if
freenx is somehow losing track of the existing session.

Has anyone seen behaviour like this?

Where does freenx keep its list of the currently active nxagents, and
how could it become confused in this way?

-- 
Mario Becroft <mb at gem.win.co.nz>