Unable to set Alt+Shift or Ctrl+Shift as keyboard layout switcher on 17.10 (with gnome-control-center keyboard)

[Norbert]

Steps to reproduce:
1. Install Ubuntu 17.10
2. Try to set keyboard layout switcher with `gnome-control-center keyboard`
"Switch to next input source" or "Switch to previous input source" to well-known and often used <Ctrl+Shift> or <Alt+Shift>

Expected results:
user is able to set <Ctrl+Shift> or <Alt+Shift> as keyboard layout switcher.

Actual results:
user is unable to set <Ctrl+Shift> or <Alt+Shift> as keyboard layout switcher from `gnome-control-center keyboard`.
Control center window does not react.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-control-center 1:3.24.3-0ubuntu5
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic i686
ApportVersion: 2.20.6-0ubuntu7
Architecture: i386
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 28 20:49:31 2017
InstallationDate: Installed on 2017-08-26 (1 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha i386 (20170826)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

[Norbert (nrbrtx)]

Same on Ubuntu-Wayland session.

$ export | grep "SESSION\|DESK"
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DESKTOP_AUTOSTART_ID="1019f0a0502c9672d3150394330015293200000049940008"
declare -x DESKTOP_SESSION="ubuntu"
declare -x GDMSESSION="ubuntu"
declare -x GNOME_DESKTOP_SESSION_ID="this-is-deprecated"
declare -x GNOME_SHELL_SESSION_MODE="ubuntu"
declare -x SESSION_MANAGER="local/artful:@/tmp/.ICE-unix/4994,unix/artful:/tmp/.ICE-unix/4994"
declare -x XDG_CURRENT_DESKTOP="ubuntu:GNOME"
declare -x XDG_SESSION_DESKTOP="ubuntu"
declare -x XDG_SESSION_ID="6"
declare -x XDG_SESSION_TYPE="wayland"

[Norbert (nrbrtx)]

Same on GNOME-Wayland session.

$ export | grep "SESSION\|DESK"
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DESKTOP_SESSION="gnome"
declare -x GDMSESSION="gnome"
declare -x GNOME_DESKTOP_SESSION_ID="this-is-deprecated"
declare -x GNOME_SHELL_SESSION_MODE="ubuntu"
declare -x SESSION_MANAGER="local/artful:@/tmp/.ICE-unix/5696,unix/artful:/tmp/.ICE-unix/5696"
declare -x XDG_CURRENT_DESKTOP="GNOME"
declare -x XDG_SESSION_DESKTOP="gnome"
declare -x XDG_SESSION_ID="7"
declare -x XDG_SESSION_TYPE="wayland"

[Norbert (nrbrtx)]

Same on GNOME Classic on Xorg:

$ export | grep "SESSION\|DESK"
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DESKTOP_AUTOSTART_ID="10473342199ca4e594150394351057476700000063950008"
declare -x DESKTOP_SESSION="gnome-classic"
declare -x GDMSESSION="gnome-classic"
declare -x GNOME_DESKTOP_SESSION_ID="this-is-deprecated"
declare -x GNOME_SHELL_SESSION_MODE="classic"
declare -x SESSION_MANAGER="local/artful:@/tmp/.ICE-unix/6395,unix/artful:/tmp/.ICE-unix/6395"
declare -x XDG_CURRENT_DESKTOP="GNOME-Classic:GNOME"
declare -x XDG_SESSION_DESKTOP="gnome-classic"
declare -x XDG_SESSION_ID="8"
declare -x XDG_SESSION_TYPE="x11"

[Norbert (nrbrtx)]

Same on GNOME FlashBack Metacity on Xorg:

$ export | grep "SESSION\|DESK"
declare -x DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
declare -x DESKTOP_SESSION="gnome-flashback-metacity"
declare -x GDMSESSION="gnome-flashback-metacity"
declare -x GNOME_DESKTOP_SESSION_ID="this-is-deprecated"
declare -x GNOME_SESSION_XDG_SESSION_PATH=""
declare -x SESSION_MANAGER="local/artful:@/tmp/.ICE-unix/7348,unix/artful:/tmp/.ICE-unix/7348"
declare -x XDG_CURRENT_DESKTOP="GNOME-Flashback:GNOME"
declare -x XDG_SESSION_DESKTOP="gnome-flashback-metacity"
declare -x XDG_SESSION_TYPE="x11"

[Alberts Muktupāvels (muktupavels)]

You can set it from GNOME Tweaks, but not from GNOME Control Center...

Related bug report:
https://bugzilla.gnome.org/show_bug.cgi?id=771009

[Launchpad Janitor (janitor)]

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