[Bug 28494] New: Gamma values are messed up in 16 bit mode

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Jun 10 15:30:10 PDT 2010


           Summary: Gamma values are messed up in 16 bit mode
           Product: xorg
           Version: 7.4
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: smanz at kip.uni-heidelberg.de
         QAContact: xorg-team at lists.x.org

If i specify "DefaultColorDepth 16" in the "Screen" section in xorg.conf, The
Image is all greenish and rather dark.

My graphics card is a "Radeon Mobility 9200 (AGP)" with only 32MB of video
memory. So I can not use the full 1920x1200 resolution of my Monitor with 24
bit. 16 bit used to work but after an update (I run gentoo linux and have now
installed the package xf86-video-ati-6.12.6 and x11-base/xorg-x11-7.4-r1)

After patching "xf86-video-ati-6.12.6/src/radeon_crtc.c" as described in a
similar bug report here:
the problem is solved. 

But maybe somebody wrote this code that now is no longer executed for a

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