Comment 32 for bug 1255558

I've found that I cannot enter my password at bootup (only Caps Lock has any effect on my keyboard) until I interact with *any* of the menu items in the upper right of the LightDM greeter (not just the keyboard layout). After clicking on any of them, I can press Esc to close the menu and then type my password normally. On the other hand, clicking to change to a guest login and back, clicking to change the session, or clicking elsewhere on the screen fails to restore keyboard functionality.

Tested on a Vaio VPCEB47GM. My other input devices (a touchpad and a Logitech USB wireless mouse) always work.