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Re: equivalent xorg.conf?
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Re: equivalent xorg.conf?


  • Subject: Re: equivalent xorg.conf?
  • From: Jeremy Huddleston <email@hidden>
  • Date: Tue, 1 Sep 2009 09:27:33 -0700


On Sep 1, 2009, at 09:04, Neil wrote:

Thanks for responding Jeremy. I figured I would be misunderstood.
X11 in OS X allows for pseudocolor via the Preferences interface. That must mean pseudocolor is supported by this graphics card and monitor.

Eh... not really.

PseudoColor isn't something that we support "on card" ... we create a lookup table in main memory and actually pass "TrueColor" values to CoreGraphics. libXplugin does most of this for us based on the color map being passed in.

In CentOS on this iMac, I'm having difficulty configuring /etc/X1/ xorg.conf to produce a pseudocolor graphics environment.

PseudoColor has been deprecated for a number of years. I remember discussing it at XDC 2007 about a year and a half ago, and nobody was moving on re-adding support for PseudoColor in pixman (which would be step 1 to adding it as a visual to the Xserver with a TrueColor screen).


You'll need to have a screen depth of 8 and only use PseudoColor visuals (if that's even still possible). You may need to go back and use a 1.2.x xorg-server release on CentOS. I'd try that first actually...

Since the OSX side of things says the hardware is capable of pseudocolor, what am I doing wrong with my xorg.conf specifications?

It may have just fallen out of supported options. Again, this is not the place for a definitive answer. Check the xorg mailing list.


Well, if X11 on OSX does it right, then maybe there's a config file somewhere that has the appropriate settings for this monitor and graphics card. Silly me.

It's not at the graphics-card level in XQuartz.

Thanks for the info on defaults. Read the man page and dumped the settings for org.x.X11 domain. Nothing usefull there, nor from the global defaults domain.

OK. Next stop - xorg mailing list.

Yep, good luck.

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 >Re: equivalent xorg.conf? (From: Neil <email@hidden>)

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