Dual monitors in Linux Mint 9

[BillybobT]

I started out using Ubuntu about a year and a half ago. Then I discovered Linux Mint. I'm not sure if I should be asking this question in the Ubuntu forum, but here goes.

When I was using Mint 8, I was able to utilize these beautiful 3360x1050 wallpapers that I found on various sites on the web. Since I started using Mint 9, I can't get my system to recognize my desktop as 3360x1050. Whenever I select one of those big images as a wallpaper, it displays it as a compressed image on each monitor. No matter what I try to do in X settings for my Nvidia card, it just won't expand the image across both monitors.

As a relative newbie to Linux, but a longtime computer user of computers, this has got me really flustered, so any help would be greatly appreciated.

I'll post my x settings if anyone has any idea what I need to do.

[elija]

Have you installed the nvidia drivers? These also install a utility called nvidia-settings which is a GUI that allows you set up dual monitor among other things.

[BillybobT]

I have the latest nvidia drivers installed and use the GUI for my settings. Under the X Screen 0 heading, it says my display Dimensions is 3360x1050, but I don't see anything like that in xorg.conf

[elija]

This is my xorg.conf

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 1.0  (buildd@yellow)  Fri Apr  9 11:51:21 UTC 2010


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

    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "LG L225W"
    HorizSync       28.0 - 83.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce 8600 GT"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option	   "Xinerama" "1"
    Option         "TwinViewXineramaInfoOrder" "DFP-0"
    Option         "NoTwinViewXineramaInfo"     "True"
    Option         "metamodes" "CRT: nvidia-auto-select +1680+0, DFP: nvidia-auto-select +0+0"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

I set "twinview" using nvidia-settings and the lines in bold I had to add myself. Without them it sometimes works, sometimes not.

[BillybobT]

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 256.29 (buildd@lansones) Sun May 30 21:36:27 UTC 2010


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

# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Acer AL2216W"
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 7950 GT"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "TwinView" "1"
Option "TwinViewXineramaInfoOrder" "DFP-0"
Option "metamodes" "DFP-0: 1680x1050 +0+0, DFP-1: 1680x1050 +1680+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

[BillybobT]

Thanks for the help. It looks beautiful now, bud I had to make some tweaks on AWN.