Do I have to reset something on my machine after this?

No problem! I noticed 2 other things:

Looks like a copy-paste bug.

I took another look. As I already mentioned, there seems to be a difference between how onLoginFailed signals work in both.
In the lock screen:

• the onLoginFailed signal is delivered as soon as the password is detected to be incorrec. I use this signal to selectAll() the password text so the user can start editing.
• The grace timeout is a separate signal onGraceLockedChanged, which is used to clear the "Login failed" message.

To summarize, the flow is: (enter password) --> (loginFailed) --[authenticator timeout expires]--> (graceLockedChanged).

Friendly ping! Since the behaviour is already different, can we merge this one and work on the SDDM part in a later PR?

Hi David!

This one was easy enough. I definitely liked the fact that I could edit the qml files directly and test it live without going through a compilation step. I especially enjoyed it after I managed to crash the lock screen with a typo but was able to fix the stuck lock screen by editing the qml file in a tty and killing the lockscreen process to make it reload. On the other hand, a compilation step here would've prevented this in the first place!

Cool! Thank you for the pointers to the correct place. It was much easier than I thought once I looked at the code.

That's correct. 2 points however:

• I think the detection of a wrong password is very fast and at least on my system I immediately get the highlighted focus. When you say muted, is it slow to do this for you?
• We probably can't do the immediate focus because of the bug mentioned on line 49: https://cgit.kde.org/plasma-workspace.git/tree/lookandfeel/contents/lockscreen/MainBlock.qml#n47. It seems if the password was entered correctly and the textbox has focus, the app would crash.

Update diff to master.

Thank you for the clarification @bcooksley. I wonder if there is a way to enforce compilation of certain parts single threaded in make. Or some other way to ensure testing these components.

Hi. This commit seems to have introduced a build failure when the optional component PythonModuleGeneration is enabled: https://paste.kde.org/pvh0kutbq/5jo1sl