I have ubuntu 18.04 with multiple languages, I tried to set the "switch to next source" in text entry settings but whatever I set there doesn't work when used.
I also tried to follow the instructions here for using gnome-tweaks but that also doesn't make a difference.
Any help would be appreciated!
Edit:
The shortcuts I have tried are: Ctrl+Space Ctrl+Shift Shift+Alt Ctrl+Alt
All of the above either in general form or Left form (Left shift + Left Ctrl, etc.)
This are the methods I have tried to set them with:
Clicking on the language icon on the top right of the screen (Marked as "En") -> Selecting "Text Entry Settings" -> Using the combination I want in the field named "Switch to next source using"
In the terminal running "gnome-tweaks" (I add the terminal output below) -> Keyboard & Mouse -> Additional Layout Options -> Switching to another layout -> Choosing the configuration I want
Two notes about the last approach: a) After making changes and closing the gnome-tweaks GUI I get a message saying "Configuration changes requires restart \n Your session needs to be restarted for settings to take effect" with the options "Restart session", "Cancel" and "OK". I've tried all of the given options, restarting the computer by myself and logging out and back in. Nothing seems to work b) The terminal output when running "gnome-tweaks" is as follows:
WARNING : Shell not installed or running
WARNING : Shell not running
NoneType: None
WARNING : Error detecting shell
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/gtweak/tweaks/tweak_group_shell_extensions.py", line 216, in __init__
raise Exception("Shell not running or DBus service not available")
Exception: Shell not running or DBus service not available
The output for "gnome-shell --version" is:
GNOME Shell 3.28.4
The last method I tried from the answer linked above is to simply run the following in the terminal:
gsettings set org.gnome.desktop.input-sources xkb-options \ "['grp:ctrl_shift_toggle']"
which had no effect