Race condition at greeter startup

Originally created by @Anonymous on #12364 (Redmine)

Here are some screenshots and a journal from when this happened.

Attachments

• after adding pw is set to off anyway.png
• greeter window opens in weird location.png
• journal_greeter_bug_pw
• systemd-analyze-fail.png
• systemd-analyze-ok.png

Parent Task: #11643 (closed)

Related issues

• Related to #12249 (closed)
• Related to #12228 (closed)
• Related to #12241
• Related to #12548 (closed)
• Related to #12386 (closed)