Unable to log in to tty1

Question

Issue

Some strange thing is happening on my system as I try to log in to tty1. After I enter the username and hit Enter, the prompt drops to a newline instead of password. After hitting Enter, the password is displayed. After hitting the first character of password, it again drops to a newline. After that while I am entering password, it shows Login Incorrect and repeats the whole thing. I can successfully Login via other ttys.

What I tried

systemctl stop getty@tty1
systemctl start getty@tty1

The issue still persists afterwards.

System

• Arch Linux
• uname -a produces Linux Ceda 4.9.6-1-ARCH #1 SMP PREEMPT Thu Jan 26 09:22:26 CET 2017 x86_64 GNU/Linux
• Output of systemctl status getty@tty1 Pastebin

Last changes

• Installing snapd and one snap package - ohmygiraffe
• Installing arch-kde-git from AUR

I personally don't think any of these can affect the system.

Edit 1

Output of sudo lsof /dev/tty1

lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
  Output information may be incomplete.
COMMAND   PID USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
plymouthd  75 root    7u   CHR    4,1      0t0   20 /dev/tty1
plymouthd  75 root    9u   CHR    4,1      0t0   20 /dev/tty1
plymouthd  75 root   10u   CHR    4,1      0t0   20 /dev/tty1
plymouthd  75 root   11u   CHR    4,1      0t0   20 /dev/tty1
plymouthd  75 root   12u   CHR    4,1      0t0   20 /dev/tty1
plymouthd  75 root   14u   CHR    4,1      0t0   20 /dev/tty1
systemd-l 604 root   20u   CHR    4,1      0t0   20 /dev/tty1
agetty    978 root    0u   CHR    4,1      0t0   20 /dev/tty1
agetty    978 root    1u   CHR    4,1      0t0   20 /dev/tty1
agetty    978 root    2u   CHR    4,1      0t0   20 /dev/tty1

Note: I had plymouth installed but I had installed it a week back but the issue wasn't present after that time. Also sudo locate plymouth gives no result. So I have no idea about where the plymouth in the above output comes from

Edit 2

I am able to login after doing sudo killall plymouthd. However, sudo systemctl status plymouthd returns Unit plymouthd.service could not be found.

Answer 1

The error was with the plymouth hook being executed mkinitcpio at startup which itself did not exist and somehow caused issues with the tty. I removed plymouth from HOOKS section in /etc/mkinitpcio.conf and ran mkinitpcio -p linux as root. The issue was resolved upon reboot.