Running VNC server and Remote destop XP simultaneously - not working

James Weatherall jnw "at"
Wed Apr 21 23:33:00 2004

This has nothing to do with your graphics card.

Remote Desktop uses different "sessions" when you connect to your XP box,
but VNC can only make session zero available.  So if you use Remote Desktop
in such a way that session zero is no longer active (i.e. it is visible on
the console, or in a connected Remote Desktop client), then VNC can't remote

This is a known limitation of current releases.

Wez @ RealVNC Ltd.

> -----Original Message-----
> From: vnc-list-admin "at" 
> [mailto:vnc-list-admin "at"] On Behalf Of jburysek
> Sent: 21 April 2004 22:02
> To: vnc-list "at"
> Cc: Seak, Teng-Fong
> Subject: Re: Running VNC server and Remote destop XP 
> simultaneously - not working
> Thanks for advices, but nothing helped.
> A realised this:
> - it realy hapened because of some shared "virtual" display driver
> - if I run VNC after reboot, everything work fine
> - if I run RDT before VNC, it is not possible run VNC (only black 
> initialization widow appear)
> - if I run RDT at small resolution, which is actual remote PC 
> resolution 
> (640x480x8), then I'm able to run VNC simultaneously (realy 
> two windows 
> side by side)
> - if I stop RDT, than also VNC stop reactions (hangs?), so I have to 
> close viewer
> - when I stop RDT and try to run VNC individualy, it create 
> only window 
> in 640x480, but it is black
> - when I ran RDT in big full screen resolution, then VNC 
> tried to create 
> big window, but only black
> - another VNC-like utility RemoteAdministraor 2.1 act in the 
> similar way 
> (none window opened after RDT was running)
> - both VNC and RAdmin works fine, if it is used prior RDT
> - the same black windows is in
> I thing, that RDT somehow "damage" video driver, which both 
> applications 
> need.
> I''l try to insert better gr. accelerator (not only 512kB).
> Any idea how to solve this?
> Does exist some person, who is runnig both RDT and VNC 
> simultaneously at 
> XP computers?
> Seak, Teng-Fong wrote:
> >	IIRC, XP Pro's remote assistant (or using remote 
> desktop) is based on 
> >the same technology of Terminal Service.  So that's probably why you 
> >can't see your disconnected session because it's not a 
> console session.
> >
> >	Two ideas:
> >1) Disable "fast user switching" if it's there and if it 
> isn't needed 
> >for remote assistant.
> >2) Stop your VNC server service (or any server in console 
> session).  Instead, run VNC server as an application from 
> within your remote desktop session.
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