Comment 0 for bug 1683383

This is a reopen of bug #36812, which has reappeared in Kubuntu 17.04 Zesty Zapus.

This is a bug about shortcuts mapped to combinations which include each other.

For example, if we have Ctrl+Shift (for keyboard layout) and Ctrl+Shift+N (to open a new terminal), then we are practically unable to use the second shortcut; this is what happens:
Ctrl press (nothing happens)
Shift press (keyboard layout change)
N (a simple N appears, since a shortcut has already fired)

The expected behavior is to fire shortcuts on the release (not on press) of the special keys (ctrl,shift,alt, etc) which is also how Windows behave. This is a serious problem for bilingual layouts, typically using Alt+Shift or Ctrl+Shift for keyboard layout change.

Apparently, the bug has reappeared after the patch that used to fix the problem (208_switch_on_release.diff) has been removed from X.Org 1.19 packages. There is an updated patch in the upstream ticket https://bugs.freedesktop.org/show_bug.cgi?id=865 (link to the attachment: https://bugs.freedesktop.org/attachment.cgi?id=129861).

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: xserver-xorg-core 2:1.19.3-1ubuntu1
Uname: Linux 4.9.0-22.1-liquorix-amd64 x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Apr 17 17:46:35 2017
InstallationDate: Installed on 2015-05-01 (716 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: xorg-server
UpgradeStatus: Upgraded to zesty on 2017-04-16 (1 days ago)