Error messages with dual-screen nvidia [RESOLVED, not fixed]

[jerkins]

System description:

Mint 12
Dell 450 workstation
nvidia NV34GL graphics card
nvidia driver version 173 (recommended by nvidia website for this card, and also by "Additional Drivers" tool)
2 Dell 19" screens

xorg.conf file:

Code: Select all

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 1.0  (buildmeister@builder75)  Thu Apr 14 09:22:52 PDT 2011

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

Section "Files"
EndSection

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

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

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       30.0 - 110.0
    VertRefresh     50.0 - 150.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
#    BusID          "10:00.0"
    VendorName     "NVIDIA Corporation"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "RenderAccel" "true"
    Option      "TwinView"
#    Option         "TwinViewXineramaInfoOrder" "CRT-0"
    Option      "metamodes" "1280x1024 1280x1024"
    Option       "TwinViewOrientation" "LeftOf"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection


Problem:

I have just upgraded to Mint 12 - all went well, apart from the usual nvidia dual-screen issues: these have mostly been solved, in that I have 2 screens that work correctly. Unfortunately I can see that it isn't 100% correct, as I get a number of errors reported.
The first one is when the x server starts - an error box appears stating:

Could not apply the stored configuration for monitors
none of the selected modes were compatible with the possible modes:
Trying modes for CRTC 548
CRTC 548: trying mode 2560x1024@50Hz with output at 1280x1024@50Hz (pass 0)
CRTC 548: trying mode 2560x1024@50Hz with output at 1280x1024@50Hz (pass 1)

The second one is when I run the NVIDIA X Server Settings app - under "X Server Display Configuration" I see:

Unable to load X Server Display Configuration page:
Failed to query NoScanout for screen 0.

Additional info:

inxi -Gx
Graphics: Card: nVidia NV34GL [Quadro FX 500/600 PCI] bus-ID: 01:00.0
X.Org 1.10.4 driver nvidia Resolution 2560x1024@50.0hz
GLX Renderer Quadro FX 500/FX 600/AGP/SSE2 GLX Version 2.1.2 NVIDIA 173.14.30 Direct Rendering Yes

I've done a whole load of searches and applied all the fixes that seemed appropriate - which is why I have a dual-screen system that mostly works. However, I would like it to work properly! Any suggestions will be gratefully received...

Thanks,
David

[jp734]

The way your xorg.conf file is configured, aren't you telling the system that you have a monitor that is capable of 2560x1024 intead of two 1280x1024?

I too have 2 monitor setup but my xorg.conf is different from yours in that I have two sections for my monitors and the server layout is different as well and I am not getting the errors you're getting. My challenge though is having one image with a size of 2560x1024 as my background for the two monitors (half of the image is on one screen and the other half on another). Is yours this way?

[jerkins]

jp734 - you're quite right, the xorg.conf file is screwy. But I have found out what's screwing up Gnome - it's installing the nvidia driver! Somewhere between the driver and Gnome the xorg file gets created incorrectly.

Anyway, I've resolved the issue - I've dumped Gnome and installed Linux Mint 12 KDE... which worked properly, with only minor tweaks to get the twin screens working. Shame, but I can't be bothered to waste my time to get a system working that I'm not sure I'll like anyway (and I find KDE acceptable).