Help with dual monitors!

Discussion in 'Linux Audio / Video' started by CoLA, May 4, 2014.

  1. CoLA

    CoLA New Member

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    Hello!

    I'm running Mint KDE 14 (will be getting 17 when it's out), graphics card is a SAPPHIRE 100355L Radeon HD 7850. I can't get the second to extend the desktop, it's only a clone of the first.
    I tried arandr but it won't let me separate the two (it just snaps back). There doesn't seem to be any Multiple Monitor setting in the Display category and when I select Right of or Left of for one of the monitors and hit Apply, nothing changes and the settings return to Clone of.


    Here's a xrandr output:

    Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 1920 x 1920
    DFP1 disconnected (normal left inverted right x axis y axis)
    DFP2 disconnected (normal left inverted right x axis y axis)
    DFP3 disconnected (normal left inverted right x axis y axis)
    DFP4 disconnected (normal left inverted right x axis y axis)
    DFP5 disconnected (normal left inverted right x axis y axis)
    DFP6 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm x 286mm
    1920x1080 60.0*+
    1680x1050 60.0
    1400x1050 60.0
    1600x900 60.0
    1280x1024 75.0 60.0
    1440x900 59.9
    1280x960 60.0
    1280x800 59.8
    1152x864 60.0 75.0
    1280x768 59.8
    1280x720 60.0
    1024x768 75.0 70.1 60.0
    800x600 72.2 75.0 60.3 56.2
    640x480 75.0 67.0 59.9
    DFP7 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
    1920x1080 60.0*+
    1600x1200 60.0
    1680x1050 60.0
    1400x1050 60.0
    1600x900 60.0
    1280x1024 75.0 60.0
    1440x900 59.9
    1280x960 60.0
    1152x864 60.0 75.0
    1280x768 60.0
    1280x720 60.0
    1024x768 75.0 70.1 60.0
    800x600 72.2 75.0 60.3 56.2
    640x480 75.0 72.8 67.0 59.9
    CRT1 disconnected (normal left inverted right x axis y axis)
  2. GrumpyOldMan

    GrumpyOldMan Active Member

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    try xrandr -display DFP7 --left-of DFP6
  3. CoLA

    CoLA New Member

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    Hmmm, seems like the command isn't quite right, it gave me a list of options. I also tried xrandr -display DFP7 --leftof DFP6 and xrandr -display DFP7 --left of DFP6.

    usage: xrandr [options]
    where options are:
    -display <display> or -d <display>
    -help
    -o <normal,inverted,left,right,0,1,2,3>
    or --orientation <normal,inverted,left,right,0,1,2,3>
    -q or --query
    -s <size>/<width>x<height> or --size <size>/<width>x<height>
    -r <rate> or --rate <rate> or --refresh <rate>
    -v or --version
    -x (reflect in x)
    -y (reflect in y)
    --screen <screen>
    --verbose
    --current
    --dryrun
    --nograb
    --prop or --properties
    --fb <width>x<height>
    --fbmm <width>x<height>
    --dpi <dpi>/<output>
    --output <output>
    --auto
    --mode <mode>
    --preferred
    --pos <x>x<y>
    --rate <rate> or --refresh <rate>
    --reflect normal,x,y,xy
    --rotate normal,inverted,left,right
    --left-of <output>
    --right-of <output>
    --above <output>
    --below <output>
    --same-as <output>
    --set <property> <value>
    --scale <x>x<y>
    --scale-from <w>x<h>
    --transform <a>,<b>,<c>,<d>,<e>,<f>,<g>,<h>,<i>
    --off
    --crtc <crtc>
    --panning <w>x<h>[+<x>+<y>[/<track:w>x<h>+<x>+<y>[/<border:l>/<t>/<r>/<b>]]]
    --gamma <r>:<g>:<b>
    --primary
    --noprimary
    --newmode <name> <clock MHz>
    <hdisp> <hsync-start> <hsync-end> <htotal>
    <vdisp> <vsync-start> <vsync-end> <vtotal>
    [flags...]
    Valid flags: +HSync -HSync +VSync -VSync
    +CSync -CSync CSync Interlace DoubleScan
    --rmmode <name>
    --addmode <output> <name>
    --delmode <output> <name>
    --listproviders
    --setprovideroutputsource <prov-xid> <source-xid>
    --setprovideroffloadsink <prov-xid> <sink-xid>
  4. GrumpyOldMan

    GrumpyOldMan Active Member

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    try xrandr --output DFP7 --left-of DFP6
  5. CoLA

    CoLA New Member

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    That gave me:

    xrandr: screen cannot be larger than 1920x1920 (desired size 3840x1080)
  6. CoLA

    CoLA New Member

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    I got it! I did manage to enable it in the settings, it was just in a different area (wasn't under Settings > Display). After I had installed the video driver, there was an AMD Control Center thing I had never gone into which let me do it (had to be admin, though).
    Problem is solved!
    ryanvade likes this.

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