GNOME Bugzilla – Bug 580259
Shutdown/Reboot incorrectly detects multiple sessions
Last modified: 2009-04-26 13:45:41 UTC
Please describe the problem: When a single non-root user attempts to do a System->Reboot (or shutdown), the admin authorization dialog comes up based on the fact that the org.freedesktop.hal.power-management.reboot-multiple-sessions is being queried for active console authorization (which defaults to "Admin Authentication"), when instead it should be querying org.freedesktop.hal.power-management.reboot (which defaults to "Yes"). The error is born from gsm_consolekit_is_single_user() of gnome-session/gsm-consolekit.c, where it will always throw out a g_warning ("Unable to list sessions...") and return FALSE after the "if (!res)" around line 1066. The reason why is because the g_proxy_new call is hitting the ConsoleKit.Manager interface, which by a policy defined in ConsoleKit.conf is not available for default (non-root) access. GetSessions is however accessible from a ConsoleKit.Seat interface... so the solution is simply to change the calling code to this type. Steps to reproduce: 1. Login as a non-root user. 2. Verify only one user is logged in via a 'who' or 'ck-list-sessions' in a console. 3. Go to System->Shut down... 4. Click the Reboot button Actual results: A dialog pops up asking for the root password. Expected results: The computer should actually reboot. Does this happen every time? Yes. Other information: Patch attached.
Created attachment 133308 [details] [review] git diff
Discussion about this issue started at http://bbs.archlinux.org/viewtopic.php?id=70803
The other solution is for ConsoleKit to enable policy access to the Manager.GetSessions method in the default ConsoleKit.conf See https://bugs.freedesktop.org/show_bug.cgi?id=20471
This is mentioned in the NEWS file: ==== Depending on how D-Bus and ConsoleKit are configured on your system, you might need the patch from https://bugs.freedesktop.org/show_bug.cgi?id=20471 for your ConsoleKit configuration. This is required so it's possible for applications to be able to know if there are more than one user logged in on the machine. ==== Your patch won't work for systems with multiple seats. It's really a ConsoleKit bug, and it was documented => NOTGNOME.