"shut down" should at least log out (prohibited by multiple users)

Thank you for your bug report.
I can't recreate this either, it could be a consequence of a behaviour defined while the desktop user is connected but the ssh user still see him. Could you try the following and see what happen?

Two users logged in, one via desktop and other via ssh. Desktop user is not an admin.
1. SSH user runs 'w' to see whether there are other people still logged in.
2. SSH user sees two users logged in BUT he decides to shut down computer.
3. Something happen to SSH user
4. Desktop user tries to shut down computer.
5. Something else happen to Desktop user.

2. SSH user sees two users logged in BUT he decides to shut down computer.
3. Something happen to SSH user

I don't see how these steps makes sense -- the ssh user can shut down fine with reboot/halt, as those tools don't use consolekit.

BTW, I meant consolekit, not policykit in the submission.

Further research:
It does not matter whether desktop user is admin or not. But it matters if the desktop user and SSH user are the same user.

Anyway, the dialog I am talking about:
System policy prevents restarting the system
when other users are logged in

An application is attempting to perform an action
that requires privileges. Authentication as the super
user is required to perform this action.

Password: [____________]

Action: org.freedesktop.consolekit.system.restart-multiple-users

[ Cancel ] [ Authenticate ]

Pressing Cancel logs out.

Thanks for test it, but at the end it wasn't really necessary at all as you said. It happens since a year or more and you are not the first who report it, so I changed the status to confirmed and importance to wishlist because it is a defined behaviour in some time time in the past. Anyway someone would check it.

Thanks again for your collaboration with Ubuntu.

Thank you for your suggestion. However, the changes you are requesting are more than a simple change and may require more discussion. I am marking this Wishlist. This does not mean your issue is not important to resolve. It simply means we will be looking at changing defaults in Ubuntu. Thanks again, and please continue to report bugs you find.

A simple fix would be to drop the user to GDM if shutdown is prohibited, no auth dialog shown. (This would probably be confusing for the user and needs a followup bug to fix properly)