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Old 08-20-2016, 09:37 PM   #1
Registered: Dec 2005
Distribution: Debian KDE / Fluxbox
Posts: 222

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How to take screenshot of only the external monitor (with the laptop screen)

I am running Debian fluxbox on my laptop, connected to a external monitor. To take a screenshot of the entire (both screen), I can do the following:
user@somewhere:~$ import -window root -display :0.0 -screen 0.png
However, I only wanted the screenshot of the external monitor (without the laptop screen).

For completeness, I've tried the following and their corresponding message in konsole.
user@somewhere:~$ echo $DISPLAY
user@somewhere:~$ :0

user@somewhere:~$ import -window root -display :0.1 -screen 0.png
user@somewhere:~$ import: unable to open X server `:0.1' @ error/import.c/ImportImageCommand/364.

Thanks in advance for the help.
Old 08-20-2016, 11:45 PM   #2
Senior Member
Registered: Mar 2012
Posts: 1,716

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You only have one X 'screen' (which spans your two monitors - Xinerama).
You could set up separate screens in xorg.conf (with Xinerama = false), although that changes the way things function a bit - no dragging between etc.

... or just crop your screenshot.

Last edited by descendant_command; 08-20-2016 at 11:47 PM.
Old 08-21-2016, 10:56 AM   #3
Registered: Feb 2006
Distribution: Debian Sid
Posts: 792

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As descendant_command says, you only have one X screen. Your window manager is handling the two monitors.

You can use the -window option to get a screen shot.

First, obtain the desktop window id on the monitor:
$ xwininfo -int

xwininfo: Please select the window about which you
          would like information by clicking the
          mouse in that window.

xwininfo: Window id: 39845928 "Desktop — Plasma"

# more info follows
# . . .
import -window 39845928 -screen 0.png
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