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I tried to set Alt+Shift as the keys to switching a keyboard layout in my Ubuntu 13.10.

The only problem is every time I type Alt+Shift when I set the keys, it is also writing "Next Group".

When I try to switch layouts, it doesn't work. What is this "Next Group" key and what I did wrong?

http://postimg.org/image/koj1poh3d/

I also tried:

setxkbmap -option grp:alt_shift_toggle en,he

but I got this error:

Error loading new keyboard description

My question is what is this "Next Group" key and why is it showing when I don't press any other key, and not how to use shift_alt to change keyboard layout.

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