whooper "at" freeshell.org
Tue Aug 27 00:40:02 2002
----- Original Message -----
From: "David Bovill" <demthu!anon.nu!david>
Sent: Monday, August 26, 2002 6:55 AM
Subject: Window Configuration
> I've spent a couple of days adding VNC to the Linux based network and it
> seems to be working really well... still a lot of research to do, but
> this all looks very exciting. Never thought this Project Athena thing
> would take off :)
> Couple of questions:
> 1) Any documentation of how to make simple changes to the xstartup
> script? I've managed to change the window manager, but not the default
> screen resolution (I need a smaller one for the laptop).
The screen resolution is set either by passing a paramater to the
'vncserver' script (different for each user), or editing the 'vncserver'
script (to change the default). Type 'vncserver -help' or check out
http://www.uk.research.att.com/vnc/xvnc.html for info about the "geometry"
> 2) VNC works fine in the office, even on 10MB ethernet. I hear about it
> being used over a modem, but can't test yet how well this works. What
> bandwidth do you need to use Office type applications? Would a 256k ASDL
> line work fine? How many users could share a line?
This depends on a number of factors. It would probably be best to test and
find out if possible. Many people use TightVNC (www.tightvnc.com) and/or
compression through a tunnel (for example, SSH) for lower bandwidth
applications. Keep in mind that adding compression sometimes makes response
time slower making it "feel" slower. Again, best to test.
> 3) Video - does the server use a video card to accelerate rendering of
> video (I read that the Windows server is dependent on the graphic card
> set up - Linux?). How does the efficiency of watching video in a VNC
> window compare with watching streaming video?
This is where WinVNC and Xvnc are very different. The Xvnc method is to be
an Xserver of it's own, so it doesn't have anything to do with the video
card (or lack thereof). The WinVNC server, on the other hand, must "steal"
the updates from the video card, therefore is more dependent on the driver.
I don't believe that the video acceleration helps with WinVNC, though. In
fact if you have one of those fancy GeForce cards with the option to make a
program window transparent using hardware acceleration in Windows you will
notice that it disappears from the WinVNC screen, presumably because WinVNC
can't "steal" the info when it is using full hardware acceleration.
> More than two I guess... thanks in advance,
Hey, this isn't my tagline ! Who put it here ?