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Old 06-15-10, 02:34 AM   #1
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Join Date: Jun 2010
Posts: 3
Default Low resolution with Nvidia drivers


I have a Zalman ZM-M220W monitor. The native resolution is 1680x1050 and it was correctly detected by the nv driver (fully updated Debian Lenny, fresh installation, kernel 2.6.26-2-amd64).

However, after installing the Nvidia driver NVIDIA-Linux-x86_64-195.36.31-pkg2, the highest resolution avaliable for that monitor is only 640x480.

In order to be able to use the computer I added a second monitor (DELL U2410, 1920x1200) which is automatically set up by the driver. Both can coexist usign TwinView (the Dell with the correct resolution and the Zalman only with the low resolution). I generated a new xorg.conf file using Nvidia-Settings but it does not solve the problem.

I have tried all kind of solutions such as setting the Zalman monitor refresh rates as per the manual, adding modelines, trying to set the native resolution in the xorg.conf files (which results in the monitor being switched off after gdm restart), disabling EDID, etc., etc., etc.

/var/log/Xorg.0.log does not offer much information on DFP-0 (Zalman), there are no errors. I guess that simply it is not correclty detected by the driver which therefore decides to use the most conservative settings.

This is my current xorg.conf file (DFP-0 is currently set to nvidia-auto-select, but I have tried many different options):

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 1.0 (buildmeister@builder62) Thu Jun 3 09:42:34 PDT 2010

Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"

Section "Files"

Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"

Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"

Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"

Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "ZMT ZM-M220W(D)"
HorizSync 30.0 - 81.0
VertRefresh 56.0 - 75.0
Option "DPMS"

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "Quadro FX 4800"
BusID "PCI:10:0:0"

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "1"
Option "TwinViewXineramaInfoOrder" "DFP-4"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0, DFP-4: 1920x1200 +1680+0"
SubSection "Display"
Depth 24
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