After todays upgrade unlock screen does not work anymore

[hiimtye]

if you have shell access, or you can chroot i.e. from a jumpdrive boot, then just roll back the updates. all pacman updates are stored in /var/log/pacman.log and old packages are stored in /var/cache/pacman/pkg/

..or at least they are in vanilla arch

in the pacman log it's very clear, the pacman command is listed, and then a transaction started message, then each updated package is listed. should be fairly easy to roll back changes