For the past week or two, I've noticed my login process to be slightly different than normal. This made me wonder if there is a security issue I should worry about. So I started searching here, but could not find a clear answer.
I see many questions about being caught in a "login loop" but that is not what is happening to me (at least I do not think so).
When I startup my laptop running 18.04 (encrypted boot drive, up to date OS) I have to enter my decryption password. This is as it has always been. Then, I am greeted with the normal login screen. I enter my password and it looks like it was accepted (no bad password message, the screen is all purple momentarily but I can still see the mouse cursor, but I cannot move it) and before the desktop background (or any desktop icons) shows, I am returned to the normal login screen. There is still no message to indicate that my password was wrong. I enter the password, again, and it starts as usual.
What is so strange to me is that this is always a double login. That is, it never prompts me only once and it never prompts me more than twice.
I looked for the
~/.xsession-errors file but I do not seem to have it.
I've used this laptop for a year with 16.04 and I installed 18.04 just after it was released and there have been no hardware changes.