Hi, the problem is still there in this package version:
Package: libpam-systemd Version: 232-18 Here is what happens when I su from root to a normal user: févr. 28 15:01:36 irancy su[7313]: Successful su for bonnaudl by root févr. 28 15:01:36 irancy su[7313]: + /dev/pts/0 root:bonnaudl févr. 28 15:01:36 irancy su[7313]: pam_unix(su:session): session opened for user bonnaudl by root(uid=0) févr. 28 15:01:36 irancy su[7313]: pam_systemd(su:session): Cannot create session: Already running in a session févr. 28 15:01:39 irancy su[7313]: pam_unix(su:session): session closed for user bonnaudl If I pile up 2 su (normal user -> root -> normal user), then I get no error message and the creation of a new session: févr. 28 15:17:23 irancy su[9191]: Successful su for bonnaudl by root févr. 28 15:17:23 irancy su[9191]: + /dev/pts/2 root:bonnaudl févr. 28 15:17:23 irancy su[9191]: pam_unix(su:session): session opened for user bonnaudl by bonnaudl(uid=0) févr. 28 15:17:23 irancy systemd-logind[2859]: Existing logind session ID 50 used by new audit session, ignoring févr. 28 15:17:23 irancy systemd[1]: Started Session c2 of user bonnaudl. févr. 28 15:17:23 irancy systemd-logind[2859]: New session c2 of user bonnaudl. févr. 28 15:17:24 irancy su[9191]: pam_unix(su:session): session closed for user bonnaudl févr. 28 15:17:24 irancy systemd-logind[2859]: Removed session c2. -- Laurent.