Another awesome unsolvable graphics problem courtesy of nVidia...

[Martin A]

Here's the setup: I have two VGA monitors connected to my graphics card (GTX 650), both with native resolutions of 1280x1024.

The nVidia control panel will allow me to set ONE OR THE OTHER, to its native resolution but not both at the same time. I have them configured as separate X screens, but I get the same result using TwinView, and trying to "force" the proper resolution by only specifying 2560x1024 in xorg.conf results in no video on either monitor. The thing is is, the control panel will list EVERY resolution but the correct one, including many neither of my monitors can handle, all the way up to 1080p...

This is unimaginably irritating, and as with most of the graphics problems I've encountered with debian, exactly the same setup will "just work" (correct res on both screens) in Ubuntu, Win 7 and worryingly, Win xp...

Using driver version 295.59.

Hopefully someone can point out what I've done wrong

[devils casper]

Something is missing in xorg.conf file. Post the contents of xorg.conf file here.

[jkwilborn]

Since I'm not proficient with Linux I can only ask a couple of questions. First where do you get an nVidia control panel software and two the problems that I had were dealt with via the 'yaboot.conf' file in the etc directory. I'm wondering if you have to add some other configuration information to this file to support what you want to do. So i am also interested in the solution to your problem. I will try to check elsewhere and see if there is another solution

Jack

[Martin A]

Since I'm not proficient with Linux I can only ask a couple of questions. First where do you get an nVidia control panel software and two the problems that I had were dealt with via the 'yaboot.conf' file in the etc directory. I'm wondering if you have to add some other configuration information to this file to support what you want to do. So i am also interested in the solution to your problem. I will try to check elsewhere and see if there is another solution

The control panel is called "nvidia-settings" I installed it with aptitude. IIRC yaboot is PPC only so doesn't affect me^

Here's my xorg.conf:

I'm aware that the mode I want to use has been commented out but I have tried uncommenting it, which results in loss of all video.

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 1.0  (buildd@biber)  Tue May 18 10:36:08 UTC 2010


Section "ServerLayout"
    Identifier     "Default Layout"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Module"
    Load           "glx"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
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 "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "CRT-0"
    HorizSync       28.0 - 55.0
    VertRefresh     43.0 - 72.0
EndSection

Section "Monitor"
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "INL LE-1708"
    HorizSync       24.0 - 82.0
    VertRefresh     55.0 - 77.0
EndSection

Section "Device"
    Identifier     "Video Card"
    Driver         "nvidia"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 650"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 650"
    BusID          "PCI:1:0:0"
    Screen          1
EndSection

Section "Screen"
    Identifier     "Default Screen"
    Device         "Video Card"
    Monitor        "Monitor0"
EndSection

Section "Screen"

# Removed Option "TwinView" "1"
# Removed Option "metamodes" "CRT-0: 1152x864 +0+0, CRT-1: 1152x864 +1152+0"
# Removed Option "TwinView" "0"
# Removed Option "metamodes" "CRT-0: 1152x864 +0+0"
# Removed Option "metamodes" "CRT-0: 1152x864 +0+0, CRT-1: NULL; CRT-1: 320x240d60 +0+0"
# Removed Option "metamodes" "CRT-0: 1280x1024 +0+0, CRT-1: 1280x1024 +1280+0; CRT-0: NULL, CRT-1: 320x240d60 +0+0"
# Removed Option "metamodes" "CRT-0: 1280x1024 +0+0, CRT-1: 1280x1024 +1280+0; CRT-0: 1152x864 +0+0, CRT-1: 1152x864 +1152+0; CRT-0: NULL, CRT-1: 320x240d60 +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "metamodes" "CRT-0: 1152x864 +0+0, CRT-1: 1152x864 +1152+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "TwinView" "0"
    Option         "metamodes" "CRT-1: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

[objuan]

Hello, I'm using the 295.53 mod , with dual monitors with separate X screen config.
Try installing the nvidia mod from nvidia. go to Nvidia Drivers Download - Nvidia

# Before you install the Nvidia Module this is what you need to do.

# For Debian
# echo blacklist nouveau > /etc/modprobe.d/blacklist-nouveau
# reboot and edit the kernel in grub by adding this string
# single nomodeset
# ctrl x to boot
# From prompt cd to the dir were you have the Nvidia module.
# excute the mod.

hope this works for the both of you