I see this question is "answered" by stating that there is no way to do this in GNOME: How to move windows around and between monitors, using keyboard short cuts? I have doubts that it should be impossible and I really want to do it.
Is there really no way to do this is Gnome? This is my output from xrandr that I don't know how to use:
$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 3840 x 1200, current 3840 x 1200, maximum 3840 x 1200
default connected 3840x1200+0+0 0mm x 0mm
3840x1200 50.0*
The following works for me (Ubuntu 12.10, Gnome Shell):
Ctrl + Alt + NUMPAD 6
moves the active window to the screen on the rightCtrl + Alt + NUMPAD 4
moves the active window to the screen on the leftNote that, for some applications like Firefox and Thunderbird, this does not work for maximized windows for me -- the window seems to be moving, but only until I release the keys. This could be a bug in the corresponding applications or Gnome Shell. As a workaround, I unmaximize first using
Ctrl + Alt + NUMPAD 5
, and maximize back later with the same combination.This is inspired by answers from How to move windows around and between monitors, using keyboard short cuts?.
EDIT: For some obscure reason these shortcuts stopped working for me.
Super + NUMPAD 7
andSuper + NUMPAD 9
achieve a similar effect.