Comrades, killed plenty of time but found how to win :-) the Internet is full of information how to use gnome-tweak-tool to enable switching of keyboard layout by Alt+Shift, but we have something you need it to Alt+Shift worked switching input sources, and is another feature that is very convenient because it allows you to quickly switch between the last two languages, while there may be a footcloth of 5 languages (like me). The solution here
, I have to warn you that there was no conflict, if you turn on Alt+Shift using gnome-tweak-tool, then disconnect there.
The bottom line:
1. To install the package dconf-editor and edit one or both of the following registry key to make it work:
2. Go to org.gnome.desktop.wm.keybindings
3. Change the input source switch on
4. Similarly, key switch-input-source-backward will change to
I used to press the buttons in reverse order, so did the turnover and running :-)