ctrl+shift+KEY shortcuts do not work with ctrl+shft keyboard layout changing

[Andrey]

Ubuntu version: XUbuntu 17.04
Linux 4.10.0-19-generic #21-Ubuntu SMP x86_64 x86_64 x86_64 GNU/Linux

Recently I upgraded to 17.04 and noticed that ctrl + shift + KEY shortcuts are not working now in applications, for example, Firefox, xfce4-terminal (GTK3 applications?). I also tried to create new fresh user and the problem persists after logging in xfce.

For example:

- In Firefox ctrl+shift+p should open new private window, but print dialog is opened (as ctrl+p pressed)
- In xfce4-terminal ctrl+shift+v should insert text from clipboard but nothing happens

But other xfce general shortcuts works, for example ctrl+alt+t opens new terminal.

Current layout switching shortcut is ctrl+shift also. I guess this porblem is related to that and causes some kind of collision because when I change this shortcut to alt+shift all ctrl+shift+KEY combinations work.

Regards, Andrey.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Andrey Vetlugin (antrew)]

I have exactly the same buggy behavior in Kubuntu 17.04 in Firefox: Ctrl+Shift+P switches layout and opens print dialog instead of opening a new private window. Ctrl+Shift is configured to switch layouts.

This is a duplicate of bug #1683383.