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How to disable the super+S shortcut on Unity?

cn flag

I am running Ubuntu Unity 20.04, and I would like to fiddle a bit with the keyboard shortcuts so that they match my other machine (a Windows 10 laptop). Specifically, I would like, as an endgoal, to have:

  • The Workspace Switcher (a.k.a. workspace Expo) on Super+Tab
  • Screenshot-of-an-area (via Flameshot) on Super+Shift+S

This requires some doing, since the Workspace Switcher is set up by default on Super+S, which conflicts with the latter.

As a start for this, the Expo key can be reassigned:

  • Via Unity Tweak Tool, on Workspace Settings and then altering the listing of Workspace shortcut for Start workspace switcher. (However, this does not work for the specific keybinding Super+Tab, for reasons I do not understand.)
  • Via CompizConfig Settings Manager, on Desktop > Expo, using the setter for Expo Key.

CCSM complains that Super+Tab is already assigned (to something called "start the Launcher Application Switcher" (?)), and this pre-existing binding can be removed by going on CCSM to Desktop > Ubuntu Unity Plugin > Launcher.


Which brings me to my question. I've already set up the mapping, and Super+Tab successfully brings up the Workspace Switcher view. However, the Super+S shortcut still has not been cleared! as in, it still brings up the Workspace Switcher view (in addition to Super+Tab).

How can I completely clear this key mapping?

mangohost

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