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I am running a Debian stable with Cinnamon graphical interface 3.6.7 and my computer is connected to a multimedia projector. I havea an Intel Graphic card.

The projected image is too big and I can't change neither the place of my multimedia projector nor the place of my wall to reduce the size of the projected image.

Thus I would like to find a command line so that the resolution of the projected image is the same but such that a black band is at the border of my screen (see Figures below). I expect then that the projected image will have a smaller size.

Solution (@Ipor Sircer)

xrandr --output HDMI1 --fb 1620x880

Current configuration: Current configuration

Expected configuration Expected configuration

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  • 1
    You may look at xrandr tool to manage you display & resolution etc...
    – francois P
    Commented Oct 17, 2018 at 19:46
  • What model projector do you have? I have found that you can possible change your settings to reduce the "overscan" as shown here and here. Or do you prefer a command line solution?
    – kemotep
    Commented Oct 17, 2018 at 20:24
  • I would prefer command line solution but I will have a look to overscan with the projector settings
    – Smilia
    Commented Oct 17, 2018 at 20:42
  • @Smilia, I would check out the xrandr command with the --transform option listed here if you are set on using command line. You will have to play around with the exact parameters to get what you desire. Again, I would check for "Overscan" or "Screen Fit" or "Aspect Ratio" settings on the projector itself to accomplish your goals.
    – kemotep
    Commented Oct 17, 2018 at 20:55

1 Answer 1

Reset to default
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Use xrandr to detect the default output. Then you can make a black border:

xrandr --output LVDS --set underscan on --set "underscan vborder" 100 --set "underscan hborder" 100

(not working with intel graphic card)

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7
  • ok thanks I ran this command: $ xrandr --output LVDS1 --set underscan on --set "underscan vborder" 100 --set "underscan hborder" 100
    – Smilia
    Commented Oct 17, 2018 at 20:17
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    I get the error: X Error of failed request: BadName (named color or font does not exist)
    – Smilia
    Commented Oct 17, 2018 at 20:17
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    Major opcode of failed request: 140 (RANDR) Minor opcode of failed request: 11 (RRQueryOutputProperty) Serial number of failed request: 47 Current serial number in output stream: 47
    – Smilia
    Commented Oct 17, 2018 at 20:17
  • Which video driver do you use? Not all supports this, only AMD and NVIDIA.
    – Ipor Sircer
    Commented Oct 17, 2018 at 20:26
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    It's a related question: unix.stackexchange.com/questions/472459/…
    – Ipor Sircer
    Commented Oct 17, 2018 at 20:50

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