Red Hat Bugzilla – Bug 855284
hanging gnome session processes cause gdm to think user still has an X session (was: gdm Session selection UI disappearing)
Last modified: 2012-10-31 21:59:14 EDT
Description of problem:
This is pretty annoying and requires constant rebooting to workaround.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Boot f18 to gdm
2. click on user
3. press cancel on password prompt
4. click on user again
4. only user icon appears no password input prompt or buttons!
4. to be able to input password with cancel and sign-in buttons
Session selection elements seem to disappear even more frequently:
often after logging out a single time.
All this makes testing quite arduous.
(In reply to comment #0)
Sorry - forgot to write this ^ sentence!:
GDM regularly loses UI elements for the password prompt
and session chooser.
For session chooser (maybe 90% reproducible)
1. login to gnome from gdm
2. logout again
3. try to login to a different desktop
3. most often Session UI (which was there in 1) is gone
Only workaround I found yet is to reboot.
This might be related to/same as bug 841755 but little detail available in that bug.
(In reply to comment #2)
> This might be related to/same as bug 841755
Ugh I meant bug 834483 (reported for 3.5.2).
Actually now I see there is already a report for the password lockup:
bug 853964 so I will change this bug just to cover the Session UI
There have been various systemd issues causing this (We hide the sesison list if you're already logged in, since typing your password will just jump back to the logged in session).
They should be fixed with recent versions of systemd/gdm.
A workaround is
systemctl terminate-user jensp
The workaround doesn't work for me:
[root@localhost ~]# systemctl terminate-user jbastian
Unknown operation 'terminate-user'.
I have on my system:
Which version provides the terminate-user command?
(In reply to comment #4)
> There have been various systemd issues causing this (We hide the sesison
> list if you're already logged in, since typing your password will just jump
> back to the logged in session).
> They should be fixed with recent versions of systemd/gdm.
Which package builds have the fix?
I still see the problem with gdm-184.108.40.206 and systemd-189-3.fc18.
This is very easy to reproduce:
1. login with gdm observing session menu
2. logout of gnome
3. start login again, note sesssion chooser UI now gone
So gdm/gnome-shell thinks the user is still logged in because of leftover processes?
Anyway I will retest again after gnome-3.5.92 hits updates-testing.
Ok I just tested with gnome-3.5.92 and still the same problem.
I also see when I logout that my name is at the bottom of the list with a highlight indicating I'm still logged in, even though I just logged out!
1. Hit CTRL-ALT-F2 to get a shell and login as root
2. pkill -u jbastian
3. systemctl restart gdm.service
And now I get the session menu again.
Ah I guess Ray meant "loginctl terminate-user <user>".
But like Jeff, even after that, I still need to restart gdm for the session menu to appear.
This is the loginctl output I see for a zombie session:
$ loginctl session-status 7
7 - petersen (1000)
Since: Fri, 21 Sep 2012 13:35:52 +0900; 13min ago
Seat: seat0; vc1
Service: gdm-password; type x11; class user
├ 2230 /usr/bin/pulseaudio --start
├ 2292 /usr/libexec/tracker-miner-fs
├ 2296 /usr/libexec/deja-dup/deja-dup-monitor
└ 2298 /usr/libexec/tracker-store
With Fedora 17 (gnome-3.4) this doesn't happen and there are
no leftover processes after logging out of gnome.
Please retest with systemd-190 from F18 (currently in bodhi).
accountsservice-0.6.25-1.fc18 has been submitted as an update for Fedora 18.
Upgrading to systemd-192 did not fix the problem, but the accountsservice-0.6.25-1.fc18 update worked. I can login/logout and I always get the session menu for the next login.
However, there are some desktop services that are refusing to die when I logout. I've start Gnome, Xfce, LXDE, xmonad, and awesome multiple times when testing for the gdm session menu, and now I have a bunch of stale, duplicate processes running.
I'm logged out, but these processes are still running as me:
[root@firefly ~]# pgrep -lf -u jmbastia
4667 /usr/bin/gpg-agent --sh --daemon --write-env-file /home/jmbastia/.cache/gpg-agent-info
4729 /usr/libexec/gvfsd-trash --spawner :1.3 /org/gtk/gvfs/exec_spaw/0
5907 conky -c /home/jmbastia/.xmonad/conky_dzen
7321 /usr/bin/pulseaudio --start --log-target=syslog
10154 deja-dup --prompt
It looks like the tracker and deja-dup processes are the worst offenders.
And because of the above processes, I have a bunch of active but stale sessions:
[root@firefly ~]# loginctl list-sessions
SESSION UID USER SEAT
6 500 jmbastia seat0
10 500 jmbastia seat0
13 500 jmbastia seat0
17 500 jmbastia seat0
19 500 jmbastia seat0
21 500 jmbastia seat0
23 500 jmbastia seat0
24 42 gdm seat0
25 0 root seat0
9 sessions listed.
different issue, not part of this bug
To be honest, today I saw the "missing session" issue too, but with KDE. I log on into KDE with gdm, loged out, but "session" button dissapeared.
Discussed at 2012-09-26 blocker review meeting: http://meetbot.fedoraproject.org/fedora-qa/2012-09-26/f18-beta-blocker-review-1.2012-09-26-16.03.log.txt . Rejected as a blocker as session selection is not in the criteria, and no-one seemed particularly keen to add it to them. (We are considering this bug as strictly being about session selection; for the login issue described in the initial report, we've accepted https://bugzilla.redhat.com/show_bug.cgi?id=853964 as a blocker).
To shorten and clarify my comment 13:
accountsservice-0.6.25-1.fc18  and systemd-192  fixed the problem for me
* should fix your issue,
* was pushed to the Fedora 18 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing accountsservice-0.6.25-1.fc18'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).
Thanks - accountsservice-0.6.25 looks to be working well for me.