The first problem with non-working hotkeys was noticed in version 14.04. But in it she had a slightly different character. In Ubuntu 14.04, keyboard shortcuts did not work on the Cyrillic layout.
This problem with non-working hotkeys in Ubuntu 18.04 has a slightly different character. The fact is that the language switching is triggered precisely when the key combination is pressed ( Alt+Shift or Ctr+Shift ), which stops waiting for the next key to enter.
That is, as soon as the Alt + Shift combination was pressed, the language switch immediately works and, for example, the Alt + Shift + O combination no longer works.
After a long search on the forums was found fixing the XOrg package for the correct operation of switching combinations and after it the very solution of the problem and .
Solution :
sudo add-apt-repository ppa:nrbrtx/xorg-hotkeys
sudo apt update
sudo apt upgrade
reboot
PS . Faced the dump of this feature. I had to install gnome-tweaks .
sudo apt-get install gnome-tweak-tool
Remove Alt+Shift alternative switch and set to another combination.
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Вадим
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