Package: libpam-systemd
Version: 238-4
Severity: important
At some point in the past, I was able to shut down my system as a
non-root user:
dbus-send --system --print-reply --dest=org.freedesktop.login1
/org/freedesktop/login1 "org.freedesktop.login1.Manager.PowerOff" boolean:true
But it now gives me this error:
Error org.freedesktop.DBus.Error.InteractiveAuthorizationRequired:
Interactive authentication required.
...probably because I have no loginctl session:
$ loginctl
SESSION UID USER SEAT TTY
0 sessions listed.
$ loginctl session-status
Could not get properties: No such process
$ strace -f loginctl session-status 2>&1|grep ESRCH
$
I log in via lightdm and run an xsession script. It may have worked in
the past because I was running ck-launch-session, which apparently no
longer exists. pam_systemd also logs "No such process":
Apr 09 11:37:30 golbez lightdm[14767]: pam_systemd(lightdm:session):
pam-systemd initializing
Apr 09 11:37:30 golbez lightdm[14767]: pam_systemd(lightdm:session):
Asking logind to create session: uid=1000 pid=14767 service=lightdm type=x11
class=user desktop=lightdm-xsession seat=seat0 vtnr=7 tty= display=:0 remote=no
remote_user= remote_host=
Apr 09 11:37:30 golbez lightdm[14767]: pam_systemd(lightdm:session):
Failed to create session: No such process
The same happens if I log in on a tty rather than X11:
Apr 09 12:07:58 golbez login[16106]: pam_systemd(login:session):
pam-systemd initializing
Apr 09 12:07:58 golbez login[16106]: pam_systemd(login:session): Asking
logind to create session: uid=1000 pid=16106 service=login type=tty class=user
desktop= seat= vtnr=0 tty=tty3 display= remote=no remote_user= remote_host=
Apr 09 12:07:58 golbez login[16106]: pam_systemd(login:session): Failed
to create session: No such process
logind is running:
root 15741 0.0 0.0 64304 5808 ? Ss 11:59 0:00
/lib/systemd/systemd-logind
(I restarted it after the first failure.)
strace shows that logind fails to open a 'cgroup' file:
openat(AT_FDCWD, "/proc/16134/cgroup", O_RDONLY|O_CLOEXEC) = -1 ENOENT
(No such file or directory)
sendmsg(12, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base=...,
iov_len=104}, {iov_base="\17\0\0\0No such process\0", iov_len=20}],
msg_iovlen=2, msg_controllen=0, msg_flags=0}, MSG_DONTWAIT|MSG_NOSIGNAL) = 124
I'm marking this "important" because, according to the package
description, registering this session is the only purpose of the
package. But on another system, I do seem to get a valid session.
- Michael
-- System Information:
Debian Release: buster/sid
APT prefers testing
APT policy: (900, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.15.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_CA.UTF-8, LC_CTYPE=en_CA.UTF-8 (charmap=UTF-8),
LANGUAGE=en_CA:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages libpam-systemd depends on:
ii dbus 1.12.6-2
ii libc6 2.27-3
ii libpam-runtime 1.1.8-3.7
ii libpam0g 1.1.8-3.7
ii systemd 238-4
ii systemd-sysv 238-4
libpam-systemd recommends no packages.
libpam-systemd suggests no packages.
-- no debconf information
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