This was a known issue in earlier pearOS NiceC0re builds - the lockscreen sits there and won't accept your password after waking from sleep.
If it happens to you:
- Switch to a TTY with
Ctrl+Alt+F3(try F2 or F4 if F3 doesn't work) - Log in with your username and password
- Find your session and unlock it:
loginctl list-sessions
loginctl unlock-session <session-id>
- Switch back to your desktop with
Ctrl+Alt+F1(or F2) - it should be unlocked now
If this keeps happening, run sudo pacman -Syu and reboot - this was fixed in later NiceC0re releases.