Isn't this a PAM bug?
I get the same result as Kristian Erik Hermansen above, namely that
login is rejected by pam_securetty. However, I do not quite see why
pam_securetty should be run.
> grep -r pam_securetty /etc/pam.d
/etc/pam.d/login:auth requisite pam_securetty.so
So, if I am not mistaken, pam_securetty should only be run for the "login"
service, not for gdm.
Also, /usr/share/doc/libpam-doc/html/pam-6.html#ss6.23 states for the
pam_securetty module: "Provides standard Unix securetty checking, which causes
authentication for root to fail unless PAM_TTY is set to a string listed in the
/etc/securetty file. For all other users, it succeeds."
So pam_securetty should not be run at all, and it should certainly not
fail.
** Also affects: pam (Ubuntu)
Importance: Undecided
Status: New
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users with no password can't log in with gdm
https://bugs.launchpad.net/bugs/104957
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