Keyboard Shortcuts in XFCE
In your panel, Applications -> Settings -> Keyboard.
Open the Application Shortcuts Tab.
Look for the the Super(Windows) + T key combination.
You can double click to edit it to something else or browse through to see if there are any duplicates.
Also make sure your holding down on the windows key while your simultaneously ...
Have you looked at and tried this: https://wiki.archlinux.org/index.php/Linux_console/Keyboard_configuration ?
You need to create a custom(ized) virtual console keymap. (This is in Arch. I guess it's different in Debian/Ubuntu and maybe others as well.)
By means of showkey entered on the virtual console you'll determine the keycode number (you can do this ...
An other alternative which does not rely on any "binary" dependency (like xdotool or wmctrl): https://github.com/AlexisBRENON/ewmh_m2m
You can install it with pip (no need to copy it manually, make it executable, etc.)
It handle multiple screens with different layouts (horizontal, vertical, mixed)
Keep window/screen ratio when moving between screens of ...