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Thread: Dual Monitor Support

  1. #1
    Join Date
    Oct 2013
    Beans
    1

    Exclamation Dual Monitor Support

    Hi, I have on Ubuntu 12.04 and I have 2 external monitors connected via port replicator, the laptop monitor is not used.
    The 2 monitors are mirrowed fine, but I can't extend the display, as I was able to do before I loaded all latest updates...
    Here are some details about my setup:

    # lspci | grep VGA

    00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

    # xrandr
    Screen 0: minimum 320 x 200, current 1680 x 1200, maximum 8192 x 8192
    LVDS1 connected (normal left inverted right x axis y axis)
    1366x768 60.0 +
    1360x768 59.8 60.0
    1024x768 60.0
    800x600 60.3 56.2
    640x480 59.9
    VGA1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
    1680x1050 60.0*+ 74.9
    1600x900 60.0
    1280x1024 75.0 72.0 60.0
    1440x900 75.0 59.9
    1152x864 75.0
    1024x768 75.1 70.1 60.0
    800x600 72.2 75.0 60.3
    640x480 72.8 75.0 66.7 60.0
    720x400 70.1
    HDMI1 disconnected (normal left inverted right x axis y axis)
    DP1 disconnected (normal left inverted right x axis y axis)
    HDMI2 disconnected (normal left inverted right x axis y axis)
    HDMI3 connected 1600x1200+0+0 (normal left inverted right x axis y axis) 367mm x 275mm
    1600x1200 60.0*+
    1280x1024 75.0 60.0
    1152x864 75.0
    1024x768 75.1 60.0
    800x600 75.0 60.3
    640x480 75.0 60.0
    720x400 70.1
    DP2 disconnected (normal left inverted right x axis y axis)
    DP3 disconnected (normal left inverted right x axis y axis)

    In the "Settings/Settings Manager/Display" I have selected to use the output for 2 external monitors, the laptop monitor is not used.

    # lsb_release -a
    No LSB modules are available.
    Distributor ID: Ubuntu
    Description: Ubuntu 12.04.3 LTS
    Release: 12.04
    Codename: precise


    I also tried the disper app, but it has an error:
    #disper -e
    There is no matching crtc for the output

  2. #2
    Join Date
    Jul 2007
    Location
    Magic City of the Plains
    Beans
    Hidden!
    Distro
    Kubuntu Development Release

  3. #3
    Join Date
    May 2009
    Location
    Indiana
    Beans
    1,884
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Dual Monitor Support

    And if you un-check the "Mirror Displays" box in Displays, it doesn't accomplish what you want?
    Jane, stop this crazy thing!

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