When the screen locks due to inactivity, and then I press a key (like SHIFT) to unblank the screen, the "Password" field sometimes has focus and sometimes does not. So sometimes, you can just type your password immediately, and other times you have to click in the Password field first. Reproducible: Sometimes Steps to Reproduce: 1. Set up the screen locker to require a password. 2. Let the screen lock after inactivity. 3. Press the Shift key a few times so the screen unblanks. 4. See if the password field has focus or not. Sometimes it does, and sometimes it doesn't. Actual Results: Sometimes the password field has focus, and sometimes it doesn't. Expected Results: The password field should always have focus when the screen unblanks. This was the case in earlier versions of KDE (say, Kubuntu 14.04 LTS).
I am using sddm 0.11.0-0ubuntu11, if that matters.
This should be fixed in Plasma 5.5. The reason was that when an application requested focus, the screen locker received a focus out event although it grabbed the keyboard. Note that the the lock screen is not provided by sddm, this is only the login screen.