Shift key for keyboard layout switching confuses lock screen

[Данило Шеган]

I'm running latest Trusty with all the updates as of today.

I am using Shift+Shift_R as the keyboard switching mechanism, and it seriously confuses the keyboard layout switcher in the lock screen: whenever I press a Shift key to enter an uppercase letter of my password, letter is typed using the current layout, but then the layout switches

To reproduce:

1. Have multiple keyboard layouts configured (I've got 3: en, sr, sr(latin))
2. Set Shift-Shift to be the keyboard layout switcher, eg. using
  gsettings set org.gnome.desktop.wm.keybindings switch-input-source "['<Shift>Shift_R']"

3. Lock screen
4. Try to type something using the Shift key while on the lock screen.
5. Watch how the keyboard layout keeps changing after you release the Shift key: layouts are changing in the reverse direction: en goes to sr(latin) and that goes to sr

FWIW, if I change the keyboard switching keybinding to eg.

  gsettings set org.gnome.desktop.wm.keybindings switch-input-source "['<Alt><Space>']"

I don't see the problem anymore.

[Данило Шеган (danilo)]

This doesn't happen anymore.

Package: unity
Version: 7.2.1+14.04.20140513-0ubuntu2