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Old 07-10-2004, 09:17 AM   #1
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Switch Color Depth of the Video Card

How can I switch the color depth of my video card without reboot the machine. For I have an application which can only run properly under 16bit color depth but my video card is configured to 24bit color. What should I do?
Old 07-10-2004, 09:52 AM   #2
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In GNOME and KDE you probably have a graphical tool for it.
You could also edit you X config file.
In the "Display" section, place a # in front of the subsections that include Depth 32 and Depth 24

Last edited by jens; 07-10-2004 at 09:54 AM.
Old 07-11-2004, 12:15 AM   #3
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Thanks. I have seen others use a command like "startx -- :1 -depth 16 -xf86config XF86Config-4.16bpp" to change their color depth and switch to the 24bit color by press the Ctrl-Alt-F7. Their system is redhat 7.3 and mine is redhat 9.0. Do you know how they can do that? Can I use this method and how?
Old 07-11-2004, 12:52 AM   #4
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What you have observed is someone starting a second X session with a customized configuration file (specified with the -xf86config XF86Config-4.16bpp argument) to run at 16bpp. They are able to then switch back to their original (24bpp) X session with the Ctrl-Alt-F7 keystroke sequence.

They can switch to the 16bpp session with a Ctrl-Alt-F8 keystroke sequence, similarly to the way they switched to the non-X terminal session they used to invoke the second X session with a Ctrl-Alt-F1 keystroke sequence.

Look at the startx man page for more details.
Old 07-11-2004, 04:00 AM   #5
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Thank you very much for your explain!!


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