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Created attachment 1069730 [details]
test.c

Description of problem:
Keyboard shorcuts stop working after changing keyboard layout

Version-Release number of selected component (if applicable):
qt-x11-4.8.5-8.el7.x86_64
qt-4.8.5-8.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Add below lines in /etc/X11/xorg.conf

Section "InputClass"
        Identifier "system-keyboard"
        MatchIsKeyboard "on"
        Option "XkbLayout" "us,ru(winkeys)"
        Option "XkbVariant" ","
        Option "XkbOptions" "grp:ctrl_shift_toggle"
EndSection

2. Login to KDE
3. Compile attached program test.c
4. Run the program and press 'ALT - x', it should press the button.
5. Change keyboard layout by pressing Ctrl - Shift - k.
6. Press 'ALT - x' again.

Actual results:
Button is not pressed after changing keyboard layout.

Expected results:
Button should be pressed after changing keyboard layout.

Created attachment 1069731 [details]
0001-Revert-QTBUG-15319-fix-shortcuts-with-secondary-Xkb-.patch

Backported patch from http://code.qt.io/cgit/qt/qt.git/commit/?id=0c03af0d4d928bdbb32b09eedb1dba3ce59e5278

Unfortunately it's too late to get this fixed in RHEL 7.2, would need to wait probably for RHEL 7.3.

This bug is still reproducible if russian layout is used as primary keyboard layout. For e.g. with this xorg configuration :


Section "InputClass"
        Identifier "system-keyboard"
        MatchIsKeyboard "on"
        Option "XkbLayout" "ru,us"
        Option "XkbVariant" ","
        Option "XkbOptions" "grp:alt_shift_toggle"
EndSection

From  my understanding this bug was never fixed in Qt4, however it was fixed in Qt5 with this change request https://codereview.qt-project.org/#/c/96993/

Granting dev_ack+, patch is available.

Fixed in qt-4.8.5-12.el7.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHBA-2016-2236.html