No login screen does not mean no system. Linux keeps several plain-text consoles running under the graphical one, and from there you can inspect services, read the real error messages and repair almost every login failure - without reinstalling anything.
Every fix on this page starts the same way: press Ctrl+Alt+F3, log in with your normal username and password, and work from the text console. This is the universal Arch rescue route - it works for a crashed login manager, a half-finished update, a full disk or a broken session, because the console does not depend on any of those things. Work through the cards in order: first find out which service failed, then read what it said, then fix the cause - not the symptom.
Before fixing anything, prove the machine itself is healthy. If the TTY answers, the kernel, disk and your account are fine, and the problem is only in the graphical layer.
whoami - it should print your usernamedf -h and look at the line for / - if it says 100 percent full, that is a different root cause (see the full-disk guide on this site)ping -c 3 archlinux.org - replies mean your network works, which the repair steps needDo not guess. systemd knows exactly which service could not start, and it keeps the receipts. One command shows the login manager your system actually uses - Plasma Login Manager on newer CachyOS installs, SDDM on older ones.
systemctl status display-managerplasmalogin.service or sddm.servicesystemctl --failed to see whether anything else broke in the same bootFailed with result exit-code tells you the service died, not why. The journal holds the why - usually a missing or mismatched library after a partial update, which is a fixable, concrete problem.
journalctl -b -u plasmalogin (use your service name from the last step)journalctl -b -p err - every error from this boot, in orderMost login-service failures after an update come down to packages that no longer match. The repair is to finish the update so the whole set is consistent again - the same fix the CachyOS team published for the October bug wave.
sudo cachyos-rate-mirrors so you pull from synced mirrorssudo pacman -Syu and accept the full upgradesudo systemctl restart plasmalogin (or sddm)reboot - a fresh boot loads the repaired libraries cleanlyIf a full update did not revive the login manager, narrow the field instead of reinstalling. These checks separate a broken service from a broken user profile - they need completely different fixes.
sudo useradd -m testuser then sudo passwd testuserls -ld ~ - it must belong to you, not rootstartplasma-wayland and read what it prints - the first error line is the clueThe whole bypass and repair, shown live step by step - watch it once and fix your system in minutes.
Watch Full VideoTry the other function keys - F4, F5, F6. On laptops you may need to hold the Fn key as well. If no console appears at all, the problem is earlier than the login manager (kernel or graphics driver), and a boot from a CachyOS live USB is the next step.
That usually means an earlier update was interrupted. First check nothing is updating with pgrep -a pacman. If nothing is running, remove the stale lock with sudo rm /var/lib/pacman/db.lck and then run the update again.
For the update-based repair, yes. If the ping test fails, plug in a cable if you can - wired networking usually works in the console even when Wi-Fi needs the desktop. Phone USB tethering also appears as a wired connection.