Q:

Use Ctrl Alt Num Pad to position Windows on Screen not desktop

So far I could position any window using the Ctrl + Alt + [num-pad-key] on the screen. Even with multiple presses I could change the size in the corner/side.
Now with 17.10 on Xorg the Ctrl + Alt + [num-pad-key] positions the window on the whole desktop rather than a single screen. That is very useless to me with a 3 screen setup.
Any idea how to make these shortcuts work per screen and that they scale the window?

A:

The same question is discussed here:
How do I restore the Unity 7 Ctrl-Alt-Numpad combination behaviour on Gnome 3?
Basically, what I have tried from this thread (and that worked) is this:

unset the problematical keybindings from gnome:
gsettings set org.gnome.desktop.wm.keybindings move-to-side-n "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-corner-ne "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-side-e "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-corner-se "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-side-s "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-corner-sw "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-side-w "['disabled']"
gsettings set org.gnome.desktop.wm.keybindings move-to-corner-nw "['disabled']"

with sw, nw, ne, se for corners, and n, e, s, w for sides.

Then I have tried installing the gnome extension called Put Windows.
Using this extension options (refresh page if you don't see the option button next to the on/off button), I was able to set the correct keybindings I wanted.
If some keybindings still do not work (that was my case for the move-windows-monitor-left/right commands), you can try to install ccsm :
sudo apt install compizconfig-settings-manager

And set the remaining keybindings under the "Window Management" section, in "Grid".

