I use Ubuntu 19.10 the Ctrl + Shift is somehow set to change the input method. Actually both Ctrl + Space and Ctrl + Shift switch the layout.
I found this:
CTRL+SHIFT+??? also changes language, when just CTRL+SHIFT should do it.
But I refuse to believe it is dead end.
Because of that all other combination that involve Ctrl + Shift + Something - that I used to - does not work for me, instead it change the input method and makes matter worst.
When look up for the settings: in "keyboard shortcuts" I set Ctrl + Space, not Ctrl + Shift.
Question is: What is the possible solution to unset it, other than reinstalling the whole system or switching to MS Windows :)
cat /etc/default/keyboard
– Gunnar Hjalmarsson Nov 07 '19 at 14:16