I want to use KDE across two monitors, but I only want the window manager to see them as one single virtual monitor. I would like to achieve this goal either using KDE settings, nvidia-settings, or xorg.conf.

What I've tried

I have tried enabling Xinerama in my xorg.conf file and it works at the login page, but then the Plasma desktop doesn't load. I get no taskbar and have to use alt-F2 to run anything, as well as encounter lots of other problems. I have also tried TwinView as I am running nvidia, but I get the same above problems.

More info

Basically I want the taskbar to stretch across both screens, and to be able to maximize windows to take up both screens. I've had this problem in every flavor of Ubuntu (Ubuntu 15, Kubuntu, Mint 17) and every window manager (Openbox, Compiz, Awesome) I've tested.

Here is a screenshot of what I see: enter image description here


# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 361.42  (buildd@lgw01-18)  Tue Apr  5 14:33:28 UTC 2016

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

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      "DELL UP2414Q"
    HorizSync       31.0 - 140.0
    VertRefresh     29.0 - 75.0
    Option         "DPMS"

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "GeForce GTX 970"

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "nvidiaXineramaInfoOrder" "DFP-2.9"
    Option         "metamodes" "DP-0.8: nvidia-auto-select +1920+0, DP-0.9: nvidia-auto-select +0+0"    
    SubSection     "Display"
        Depth       24

Other window managers might work better, but I really like the one in Plasma 5 and would prefer to keep using it.

1 Answer 1


Turn off Twinview. Change this line in xorg.conf

   Option         "Twinview"   "false"

Note: When you maximize a window it will go across both monitors, but I think this is what you want.

Also Note: This only works with Nvidia cards and driver.

  • 1
    TwinView works only on NVIDIA cards does it not? Oct 23, 2021 at 13:04

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