VNC connection lost when initiating telnet session quits

[Dr Robert Young]

Let's say I start the vncserver from an initial telnet session.

Using the  VNC server for Solaris 7, the same session "stays" open when 
I start/stop the VNC client.  So far it behaves as expected.

However, if I exit the telnet session which started the server,  all 
the desktop apps "disappear" and I have a grey backdrop. If I then 
"kill" the server, the client says the server connection has been 
terminated.

I have tried "nohup vncserver &" with the same results, and started the 
window manager /xterm in xstartup using nohup ---& as well with the 
same results. .

Any ideas? I have a nagging feeling I have seen something like this 
before 10-15 yrs ago, but memory fails.