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It is a simple question about vncserver. Is there a command line switch to start vncserver in grayscale mode? hours and hours I am searching at internet but I can't figure out how to do it.

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Define "gray scale"? And why do you want to do that? – quanta Aug 26 '11 at 15:35
for faster connection – rasputin Aug 26 '11 at 22:32
What about the -depth, -pixelformat option and/or 2 lines unset SESSION_MANAGER, exec /etc/X11/xinit/xinitrc in ~/.vnc/xstartup? – quanta Aug 27 '11 at 3:02
up vote 1 down vote accepted

This is not done on the server side but on the client. UltraVNC for example can set it to "8 dark colors", "4 Grey colors" or "Black & White". Other clients probably can do it, too. The manual of your client is your friend.

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Different clients have different options available. I use TightVNC client and I know they have an 8-bit color option but RealVNC client lets you choose between 8, 64, 256, and full color options.

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