Several weeks ago I installed Linux Mint 9 on my 16GB USB Corsair jump drive. I use it at work when I need to rescue a Windows PC (save a PC running Vista twice this month). What I didn’t like was having to authenticate my account to shutdown the PC. The system always displayed the message System policy prevents stopping the system when other users are logged in. I always had to log off first to shutdown the computer.
I found a fix at Len’s site which solved my problem. I am posting the modified org.freedesktop.consolekit.policy at my box.net as a reference for myself. Here are the step I used to fix the issue:
- Open terminal and type gksu nautilis
- Navigate to /usr/share/polkit-1/actions
- Right click org.freedesktop.consolekit.policy and open with gedit
- Scroll down to section org.freedesktop.consolekit.system.stop-multiple-users
- At allow_active, replace auth_admin_keeps with yes
- Scroll down to section org.freedesktop.consolekit.system.restart-multiple-users
- At allow_active, replace auth_admin_keeps with yes
Now I am able to shutdown Linux Mint running from my USB jump drive.
Thanks to Marilen Aretius Corciovei for originally posting this fix.
ratedmaxpower 
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