I found this thread because I had this issue today. After booting up my laptop I did
sudo pacman -Syu and it worked fine. There were no updates available. I just closed the terminal emulator. After few minutes (I think more than 15 in this case) I tried to run another command with
sudo, it asked me for my password again and the response was “Sorry, try again.” I thought that I had caps-lock on or something like that, but no. Keyboard layout was also fine and I even tried typing my password in text editor to check that and it was okay. I did it 3 times “wrong”.
What I did to unlock myself.
faillock - it shows me that I put wrong password 3 times
faillock --reset - to unlock it
failock - I run it again to confirm that there is no info about mistype password right now
- Everything works again.
Still don’t know… but I’m like 99% sure that I was typing my password correct from the beginning.