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I use Ubuntu 12.04 on a Toshiba Portege R600. Normally I have a flat green background (the middle choice of the custom set under wallpapers in the right-mouse-click GUI).

When I plug in a VGA monitor for two-screen usage the background on that and on the laptop screen go black. They remain black after I unplug the monitor and give the command:

xrandr --output LVDS1 --auto --output VGA1 --off

Is there a trick to maintain the green blackground, at least on the laptop screen, or at least regain it automatically on the laptop screen?

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    Per OP, resolved by upgrading: "This bug went away when I installed Ubuntu 14.04 on a new Toshiba Z930."
    – belacqua
    May 12 '14 at 19:14
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An workaround will be to use the following command:

xrandr --output LVDS1 --auto --output VGA1 --off && gsettings set org.gnome.desktop.background primary-color "#73D216"

This will set again your background color to #73D216 (green).

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  • Thanks but no go: DISPLAY=:0: Command not found. Sorry, should have added I use Gnome Classic.
    – Rob Rutten
    Oct 11 '13 at 12:54
  • @RobRutten Are you sure that you copy it correctly? Dont't use any space before or after = sign. Oct 11 '13 at 13:00
  • alias vga-off 'xrandr --output LVDS1 --auto --output VGA1 --off && DISPLAY=:0 GSETTINGS_BACKEND=dconf gsettings set org.gnome.desktop.background primary-color "#73D216"'
    – Rob Rutten
    Oct 11 '13 at 13:06
  • Or is it my use of tcsh? Sorry, I am not too unix-knowledgeable...
    – Rob Rutten
    Oct 11 '13 at 13:12
  • @RobRutten Oh... tcsh. Ok, don't use these variables DISPLAY=:0 GSETTINGS_BACKEND=dconf. See if it is working with gsettings set org.gnome.desktop.background primary-color "#73D216" only. Oct 11 '13 at 13:20
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This bug went away when I installed Ubuntu 14.04 on a new Toshiba Z930.

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