If I am using settings bellow I am not able to use Ctrl+Shift+something shortcuts in any of my favourite programs. The same is for Ctrl+Alt+something combinations.
Option "XkbLayout" "us,cz_qwerty"
Option "XkbOptions" "grp:ctrl_shift_toggle"
Nice behaviour will be if driver waits for release of (Ctrl|Alt)+Shift and if there won't be any key pressed in short past it will generate event ctrl_shift_toggle.
Thaks a lot for solving it.
*** This bug has been marked as a duplicate of bug 865 ***