I can confirm, that this regression affects 4.18.0-15 as well as
4.15.0-44. After downgrading to 4.18.0-14 terminals start to work again
for me.
This is the relevant log output:
$ journalctl -f
Feb 05 13:39:28 laptop login[16070]: pam_unix(login:auth): conversation
failed
Feb 05 13:39:28 laptop login[16070]: pam_unix(login:auth): auth could not
identify password for [ben]
Feb 05 13:39:32 laptop login[16070]: FAILED LOGIN (1) on '/dev/tty2' FOR
'ben', Authentication failure
Feb 05 13:39:32 laptop login[16070]: pam_securetty(login:auth): cannot
determine username
Feb 05 13:39:36 laptop login[16070]: FAILED LOGIN (2) on '/dev/tty2' FOR
'UNKNOWN', Error in service module
Feb 05 13:39:36 laptop login[16070]: pam_securetty(login:auth): cannot
determine username
Feb 05 13:39:39 laptop login[16070]: FAILED LOGIN (3) on '/dev/tty2' FOR
'UNKNOWN', Error in service module
Feb 05 13:40:28 laptop systemd[1]: getty@tty2.service: Service has no
hold-off time, scheduling restart.
Feb 05 13:40:28 laptop systemd[1]: getty@tty2.service: Scheduled restart
job, restart counter is at 6.
Feb 05 13:40:28 laptop systemd[1]: Stopped Getty on tty2.
Feb 05 13:40:28 laptop systemd[1]: Started Getty on tty2.
Related forum entries of me/others having this problem:
https://forums.linuxmint.com/viewtopic.php?f=47&t=287366
https://forums.linuxmint.com/viewtopic.php?f=18&t=286798
** Tags added: kernel-bug regression-update
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https://bugs.launchpad.net/bugs/1812679
Title:
Upgraded kernel to linux-image-4.18.0-14.15-generic 4.18.20, and
discovered I can no longer log into a local console
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