A little help needed

[Jeferson Charles Mayer]

----- Original Message -----
From: Arnt Witteveen <Arnt.Witteveen "at" vartec.be>
To: 'list: vnc' <vnc-list "at" uk.research.att.com>
Sent: Wednesday, November 03, 1999 8:13 AM
Subject: FW: A little help needed


 ... lines deleted (basic questions concerning WinVNC)

> > 3. Running VNC on a 10Mb local network, server and viewer both on
Pentium
> > 233MHz, I did a simple test: just moving the mouse pointer around (no
> mouse
> > buttons pressed). The effect was the following: at the server machine, I
> > could see a smooth movement of the pointer, but, an the viewer, I just
> could
> > see a mouse pointer jumping terribly, unless I moved it VERY slowly.
Well,
> > it just seemed that something was very wrong, because all I was doing
was
> > moving normally the mouse around the desktop, using 16 bits color depth,
> > 800x600 at both ends. What could cause so much overhead?
>
> Nothing... If the server were X-win, it would work fast, I think. I'm in
> almost the same situation as you (but a 100Mb network), and I notice the
> same thing. From what I've read on this list, the problem is not so much
> getting the update acress the wire, but determining when something has
> updated/changed... This seems to go much better under X-Win than under
> MS-Win.
>
> Arnt

OK, I can understand that the change detection issue is not so easy, but I
wonder why it should be so difficult to get a smooth view when all I'm doing
is moving the mouse around. I just thought that it should be obvious to VNC
that the mouse pointer is moving and that this movement causes screen
changes. All right... I must be missing something else. I am still trying to
understand what is happening behind-the-scenes in situations like that one
described above (mouse moving only). I will be looking into the source code
soon. Maybe then things get clearer.

Thank you!

Jeferson Charles Mayer
Software Developer






---------------------------------------------------------------------
The VNC mailing list - see http://www.uk.research.att.com/vnc/intouch.html
---------------------------------------------------------------------