Hi, I'm having a trouble with su and pam-0.75 (with absolutely no patches, just the original tarball). As a regular user, I can su to root as usual, just giving root's password. I can also su from a regular user to another one without problems. BUT, as root, I cannot su at all, getting this prmission denied error: [andreas@pandora Linux-PAM]$ su Password: [root@pandora Linux-PAM]# su andreas su: Permission denied [root@pandora Linux-PAM]# /etc/pam.d/su is quite normal: #%PAM-1.0 auth required /lib/security/pam_unix.so shadow nullok account required /lib/security/pam_unix.so password required /lib/security/pam_cracklib.so password required /lib/security/pam_unix.so shadow use_authtok nullok session required /lib/security/pam_unix.so session optional /lib/security/pam_xauth.so The logs: Jan 4 13:57:38 pandora su(pam_unix)[1669]: session opened for user root by andreas(uid=681) Jan 4 13:57:40 pandora su(pam_unix)[1671]: session opened for user andreas by andreas(uid=0) Jan 4 13:57:40 pandora su(pam_unix)[1671]: session closed for user andreas Note that the session was opened, but closed right away. Any clues? I also tried a CVS copy, same problem.