Bypassing lock screen

[First]

CONDITION:
  settings > keyboard > hotkeys > next source: Caps Lock
  # suppose num lock can be effected too
  # Mod2+Caps Lock or Caps Lock doesnt matter

HOWTO:
  1. lock screen with super + l
  2. press caps lock then unity will blink and you will see desktop for a half a second or so. on that period do clicks anywhere in window. on success unity lock screen wont reappear and you will be inside.

BTW:
  sometimes it works from 1st try, sometimes need some pron with clicking
  after i done it on working machine i retried on virtualbox fresh installed without any encryption. Works too.
  i use hp probook 450 g1 hasswell. graphic card is intel builtin.

EXPECTED:
  on pressing caps lock next source switch

HAPPENED:
  -.-

lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04

apt-cache policy unity
unity:
  Установлен: 7.4.0+16.04.20160715-0ubuntu1
  Кандидат: 7.4.0+16.04.20160715-0ubuntu1
  Таблица версий:
 *** 7.4.0+16.04.20160715-0ubuntu1 500
        500 http://ru.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     7.4.0+16.04.20160415-0ubuntu1 500
        500 http://ru.archive.ubuntu.com/ubuntu xenial/main amd64 Packages

[First (a13x-prinz)]

forgot to say tried it with en + ru layouts, but suppose it doesnt matter

[Dmytro Korzhevin (korg)]

>>
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1605012