visual classes in vnc

Robert Budzynski budzynsk "at" cclan.fuw.edu.pl
Thu, 26 Feb 1998 13:35:41 +0000


Hi,

I'm a little bit confused about how vnc handles the visual classes
stuff.  I guess this is because I'm quite confused about the same in X
in general.  I'm not really looking for an in-depth technical
explanation, just want to know how to make sure the best display class
available is chosen so I can have a nice colorful display in the
remote client.  As things are, I just ran Xvnc on a solaris box and
connected with vncviewer from win95 on a 24 bit color screen -- and
got a StaticGray (I think) 8 bit visual in the client. When connecting
to the same Xvnc session with linux vncviewer, displayed on an
Xterminal with 8bit PseudoColor default visual, ditto -- StaticGray.

NB in the latter case the perfomance kind of sucks, though it's still
not bad considering that my linux box is a 386 with 8 megs RAM! and
the stuff is going through several layers of networking... OTOH the
former setup performs pretty well (128 megs RAM on the 2-cpu solaris
sparc, 64 megs on the windows 200 MHz pentium mmx with a matrox
something VGA)

If anyone could explain to me in simple terms the display class stuff,
and proper use of the '-cc' option in Xvnc, I'd be really happy.

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Robert J. Budzynski
Physics Department Computer Center
Warsaw University
Warsaw, Poland
Home page: <http://info.fuw.edu.pl/~budzynsk/home.html>

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