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Old 08-03-07, 03:53 PM   #1
luispa
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Join Date: Aug 2007
Posts: 9
Default Color depth issue when using TNT2 with ViewSonic VA1730wb LCD Monitor

Hi,

This is my first post here. I recently bought a ViewSonic VA1703wb LCD monitor. I made the right changes for making it show the recommended resolution (1440x900) but I can't find out how to make it show 24 bit colors. It works up to 16 bit colors. Color depth is the same when choosing 24 or 16. I'm using a Riva TNT2 Model 64/64 Pro with 32mb RAM.

I suspect there's some kind of communication error between the TNT2 card and the monitor because xwininfo says color depth is 24 but monitor shows up to 16. I checked this monitor with an iBook G4 and colors were OK. I also checked the TNT2 with an old CRT monitor and also colors were OK.

I'm using the latest legacy driver (1.0.7184). These are some of the more relevant lines of xorg.conf:
...
Section "Module"
Load "bitmap"
Load "dbe"
Load "ddc"
Load "extmod"
Load "freetype"
Load "glx"
Load "int10"
Load "record"
Load "v4l"
Load "vbe"
...
Section "Device"
Identifier "nVidia"
Driver "nvidia"
BusID "PCI:1:0:0"
VideoRam 32
Option "UseEDID" "False"
Option "UseDisplayDevice" "DFP"
Option "FlatPanelProperties" "Scaling = centered, Dithering = enabled"
Option "IgnoreDisplayDevices" "CRT, TV"
Option "NoLogo" "True"

EndSection

Section "Monitor"
Identifier "VA1703wSERIE"
Option "DPMS"
Option "DPI" "98 x 113"
HorizSync 24-70
VertRefresh 50-75
Modeline "1440x900" 106.5 1440 1520 1672 1904 900 903 909 934
Gamma 0.6
EndSection

Section "Screen"
Identifier "Default Screen"
Device "nVidia"
Monitor "VA1703wSERIE"
DefaultDepth 24
...
SubSection "Display"
Depth 24
Modes "1440x900" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
EndSubSection

Here's Xorg.0.log file. According to this log, driver treat monitor like a CRT one.

I'll really appreciate any kind of help. Thank you very much in advance,

Luis Pablo
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