Console hangs when trying to enter Emergency target or "Login incorrect" is printed in loop

Solution Verified - Updated -

Issue

  • When the system tries to enter Emergency target, no prompt is printed or a Login incorrect message is printed in loop indefinitely

    Login incorrect

Login incorrect

Login incorrect

[...]

  • Alternatively checking the journal while the system tried to enter Emergency mode, the following messages may be seen

    [...] systemd[1419]: emergency.service: Failed to set up standard input: Inappropriate ioctl for device 
[...] localhost systemd[1419]: emergency.service: Failed at step STDIN spawning /bin/plymouth: Inappropriate ioctl for device 
[...] systemd[1580]: emergency.service: Failed to set up standard input: Inappropriate ioctl for device 
[...] systemd[1580]: emergency.service: Failed at step STDIN spawning /usr/lib/systemd/systemd-sulogin-shell: Inappropriate ioctl for device

Environment

  • Red Hat Enterprise Linux 7 and later
    • emergency.target
    • serial consoles (e.g. ttyS0 device)

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