Igor Gnatenko, I partly solve my problem via KSuperKey app http://kde-apps.org/content/show.php?content=154569 so maybe it solve your needs too.
But I also waiting fix for this issue in xkb. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to the bug report. https://bugs.launchpad.net/bugs/36812 Title: Keyboard layout change on hotkeys press instead of release and do not work well with shortcuts To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-control-center/+bug/36812/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
