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[Bruce Pieterse <dev@xxxxxxxxxx>]

This has been fixed in Vivid Vervet (15.04) with the gnome 3.14 packages
and should be available later today.

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https://bugs.launchpad.net/bugs/1218322

Title:
  Can't set keyboard layout change to alt+shift, ctrl+shift, etc.

Status in elementary OS:
  Confirmed
Status in Gnome Settings Daemon:
  Unknown
Status in Ubuntu GNOME:
  Triaged
Status in gnome-control-center package in Ubuntu:
  Fix Released
Status in gnome-settings-daemon package in Ubuntu:
  Triaged
Status in gnome-settings-daemon source package in Saucy:
  Won't Fix
Status in gnome-control-center package in ALT Linux:
  Unknown
Status in gnome-control-center package in Baltix:
  Confirmed
Status in gnome-control-center package in Gentoo Linux:
  Invalid
Status in gnome-control-center package in Mandriva:
  Invalid

Bug description:
  ***
  The old PPA, ppa:attente/1218322 is superceded by the following one. You can remove the old repository using ppa-purge.
  ***

  A PPA which should provide some relief for this issue is available at
  https://launchpad.net/~attente/+archive/modifier-only-input-switch. To
  install:

  sudo add-apt-repository ppa:attente/modifier-only-input-switch
  sudo apt-get update
  sudo apt-get upgrade
  (log out, log in)

  If the packages improve the situation for you, you can pin them using:

  sudo apt-mark hold compiz
  sudo apt-mark hold gnome-settings-daemon
  sudo apt-mark hold unity

  If the packages don't work for you, you can purge them using:

  sudo ppa-purge ppa:attente/modifier-only-input-switch

  === compiz ===

  Impact: modifier-only key bindings need to be independent of key-press
  order, there's no support for double tapping two modifier keys of the
  same type

  Test case:
  - add at least two input sources through gnome-control-center's text entry settings
  - use gsettings to set the input switching shortcut to ctrl+left shift: gsettings set org.gnome.desktop.wm.keybindings switch-input-source "['<Primary>Shift_L']"
  - holding left shift, press and release ctrl
  -> the current input source should change

  Regression potential: possible, but highly unlikely, that some key
  bindings may be triggered due to the removal of some code that would
  normally prevent a possible tap from occurring.

  === unity ===

  Impact: gnome-settings-daemon eats modifier-only shortcuts preventing
  them from propagating down to applications

  Test case:
  - open gnome-control-center's text input settings
  - set the next input source key binding to ctrl+left shift
  - open gnome-terminal
  - press ctrl+shift+t
  -> gnome-terminal should open a new tab

  Regression potential: the additional input switch key bindings could
  collide with other functionality such as opening the dash or hud

  === gnome-control-center ===

  Impact: the UI to change the layout switching keys doesn't work

  Test case:
  - open gnome-control-center's text input settings
  - click on the "next layout key" entry
  - try entering a key combinaison (e.g ctrl-space)
  -> the UI should reflect the new keys

  Regression potential: that UI was not working before, it should only
  be an improvement (some key combos are not working as expected, that's
  another issue and shouldn't be mixed with this one)

  === gnome-settings-daemon ===

  Impact: attempting to change keyboard layouts using only modifier keys
  doesn't work

  Test case:
  - add at least two input sources through gnome-control-center's text entry settings
  - use gsettings to set the input switching shortcut to ctrl+left shift: gsettings set org.gnome.desktop.wm.keybindings switch-input-source "['<Primary>Shift_L']"
  - press and release ctrl+left shift
  -> the current input source should change

  Regression potential: The input switching shortcut might capture other
  non-modifier shortcuts, but users will need to consider this when
  choosing their switching shortcut anyways. For users this bug affects,
  this represents a working solution for a critical bug.

  ----------------------

  Test results for different keyboard layout change hotkeys may be
  viewed and added in the Google Docs table, created by Norbert
  (https://docs.google.com/spreadsheet/ccc?key=0Ao5e713Ig9g_dEJrX2NRYlpLWWVzSWxsVXU4ck9HYVE&usp=sharing).

  ----------------------
  Recent discovered bugs related to keyboard layouts:
     * keyboard layout settings must be consistent between gnome-control-center keyboard, indicator-keyboard and gnome-tweak-tool and /etc/default/keyboard (bug 1270574)
     * Ubuntu 14.04 should have gnome-tweak-tool installed by default because of many settings that are missed gnome-control-center (bug 1270572)
     * Please add ability to set keyboard shortcuts to unity-control-center launched from GNOME session FlashBack (Compiz and Metacity) (bug 1282637)
     * Unable to rename new folder in GtkFileChooserDialog while changing keyboard layout (bug 1299519)

  Separate bug reports for individual layout switching hotkey
  combinations:

  Super+Space and Shift+Super+Space:
     * Unity greeter (bug 1245137);
     * Unity session (bug 1245136);
     * lock screen - gnome-screensaver (bug 1245138, bug 1245256);
     * ubiquity installer (bug 1242572).

  Alt+Shift:
     * Unity greeter (bug 1245258)
     * Can't set keyboard layout change to Alt+Shift (bug 1245926)
     * Shift must be pressed pressed first (bug 1266179)

  Ctrl+Shift:
     * lock screen - gnome-screensaver (bug 1245270)
     * Unity greeter (bug 1245268)
     * Can't set keyboard layout change to Ctrl+Shift (bug 1245991)
     * If keyboard layout switching hotkey is set to Ctrl+Shift, Ctrl+Shift+C/V are not working in gnome-terminal (bug 1246656)

  Shift+Shift:
     * Can't set keyboard layout change to Shift+Shift (bug 1245272)
     * lock screen - gnome-screensaver (bug 1245278)
     * Unity greeter (bug 1245280)

  Bugs which belong to keyboard layout switching:
     * Hotkeys not functional in non-latin keyboard layout in 13.10 (bug 1226962)
     * Keyboard Layout Options window is missed in gnome-control-center keyboard (bug 1245064)
     * Unable to set keyboard LED to show alternative layout in gnome-control-center keyboard in Saucy (bug 1245188)
     * Unable to set Miscellaneous compatibility options in gnome-control-center keyboard in Saucy (bug 1245199)
     * Keyboard shortcut for changing keyboard layout does not work on lock screen (bug 1244548)
     * [FFe] indicator-keyboard not working under greeter (bug 1228207)
     * Lost ability to remap Caps Lock to Ctrl (bug 1215826)
     * gnome-control-center keyboard no longer has way to modify caps lock key behavior (bug 1224575)
     * Pressing Caps Lock toggles LED even when mapped to another key (bug 1221403)
     * Switching layout turns off NumLock (bug 1247668)
     * Pressing keyboard shortcut to switch keyboard layout causes temporary loss of focus (bug 1244090)
     * Unity shortcuts (Super+A/F/M/C/V) do not work on non-latin layout in Trusty - shortcuts are defined via keyboard layout, not the keys (bug 1280759)
     * Binding ctrl+shift, alt+shift, etc for switching keyboard layout makes shortcuts with ctrl+shift, etc not working in any program (bug 1245473)

  ----------------------

  Can't set keyboard layout change to ctrl+shift, Caps Lock, alt+shift
  etc. "Shift", "CapsLock" keys are just ignored in settings. Also the
  default shortcut was set to "Super+Space" that is inconveniently,
  because Dash is opening when you swich your keyboard layout.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.10
  Package: indicator-keyboard 0.0.0+13.10.20130829.1-0ubuntu1
  ProcVersionSignature: Ubuntu 3.11.0-2.5-generic 3.11.0-rc5
  Uname: Linux 3.11.0-2-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.12.1-0ubuntu2
  Architecture: amd64
  Date: Thu Aug 29 14:21:54 2013
  InstallationDate: Installed on 2013-07-31 (28 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130730)
  MarkForUpload: True
  ProcEnviron:
   LANGUAGE=ru_UA:ru
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=ru_UA.UTF-8
   SHELL=/bin/bash
  SourcePackage: indicator-keyboard
  UpgradeStatus: No upgrade log present (probably fresh install)

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