How to make the LCD show 24 bits colors (Part 2)

[Luis Pablo Gasparotto]

Hi,

After making a lot of changes. My monitor is still showing 16 bit 
colors. There's something strange, if I run xwininfo command I get the 
following report:

   Absolute upper-left X:  0
   Absolute upper-left Y:  49
   Relative upper-left X:  0
   Relative upper-left Y:  24
   Width: 1440
   Height: 825
   Depth: 24
   Visual Class: TrueColor
   Border width: 0
   Class: InputOutput
   Colormap: 0x20 (installed)
   Bit Gravity State: NorthWestGravity
   Window Gravity State: NorthWestGravity
   Backing Store State: NotUseful
   Save Under State: no
   Map State: IsViewable
   Override Redirect State: no
   Corners:  +0+49  -0+49  -0-26  +0-26
   -geometry 1440x825+0+25

These are the relevant sections in xorg.conf:
...
Section "Module"
     Load           "i2c"
     Load           "bitmap"
     Load           "ddc"
     Load           "extmod"
     Load           "freetype"
     Load           "int10"
     Load           "vbe"
     Load           "glx"
EndSection
...
Section "Monitor"
     Identifier     "VA1703wSERIE"
     HorizSync       24.0 - 70.0
     VertRefresh     50.0 - 75.0
     Gamma           0.6
     ModeLine       "1440x900" 106.5 1440 1520 1672 1904 900 903 909 934
     Option         "DPMS"
EndSection

Section "Device"
     Identifier     "nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 
64 Pro]"
     Driver         "nvidia"
EndSection

Section "Screen"
     Identifier     "Default Screen"
     Device         "nVidia Corporation NV5M64 [RIVA TNT2 Model 64/Model 
64 Pro]"
     Monitor        "VA1703wSERIE"
     DefaultDepth    24
     DefaultFbBPP    32
     Option         "AddARGBGLXVisuals" "True"
     Option         "NvAGP" "1"
     Option         "AllowDDCCI" "True"
     Option         "UseDisplayDevice" "DFP"
     Option         "IgnoreDisplayDevices" "CRT"
     Option         "FlatPanelProperties" "Dithering = Enabled"
     Option         "ModeValidation" "NoDFPNativeResolutionCheck"
     Option         "DigitalVibrance" "50"
     Option         "UseEdidFreqs" "False"
     Option         "NoLogo" "True"
     Option         "AllowGLXWithComposite" "True"
     Option         "PseudoColorVisuals" "Off"
     Option	   "UseFBDev"	"True"
     SubSection     "Display"
         Viewport    0 0
         Depth       16
         Modes      "1440x900" "1024x768" "800x600" "640x480"
     EndSubSection
     SubSection     "Display"
         Viewport    0 0
         Depth       24
         Modes      "1440x900" "1024x768" "800x600" "640x480"
     EndSubSection
EndSection

I made a few changes to xorg.conf and attached my old CRT monitor and I 
saw 24 bit colors. I also attached the ViewSonic VA1703wb to an iBook G4 
VGA adaptor and I saw 24 bit colors. I suspect the problem is related to 
the way the TNT2 send information to the LCD monitor.

I'll really appreciate any kind of help.

Thank you in advance.

Luis Pablo