Re: VNCserver goes into session not gdm
On Sunday 14 April 2002 5:56 pm, Carlos Sousa wrote:
[snip]
> So it would seem your unix machine must have as much instances of
> vncserver running as you have users (each on its own virtual display, I
> presume). gdm is still not required because user selection and
> authentication is done on the client side (by selecting machine:display
> and password).
>
> Actually, I don't think it's possible to use gdm with VNC's X server,
> which must be already running under a user ID when the client connects.
> What you want is probably an X server for Windows that can be managed
> by gdm, and VNC ain't no such thing.
It is possible to have VNC launch as a service when required from inetd.
You define ports in /etc/services and add lines to inetd to display VNC
servers of a particular resolution & colour depth, say 800x600x8 on port
5850 & 1024x768x8 on 5851. Any client that wants an 800x600@8 session
runs vncviewer to serverhost:50 and gets an X login window (gdm, kdm,
etc). Use serverhost:51 to get the login at 1024x768@8. It works very
nicely, but it loses one advantage of a 'normal' vncserver session - it's
no longer stateless :) When the client closes the window, the session
gets shut down.
The docs for this are on the VNC site somewhere, and the feature's been
around for a while - I've been using at work for 18 months or so and it
works really well. I can dig out more details if anyone's interested.
> Anyway, you can take a look at a detailed paper on VNC on
> ftp://ftp.uk.research.att.com/pub/docs/att/tr.98.1.pdf
>
> Good luck.
Regards, Martin
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