Where does the plus sign in file permissions come from?

[Otto Kekäläinen]

Lainaus Martin Pitt <martin.pitt at ubuntu.com>:
>> The symptom involves that sometimes the ACL is on and sometimes off.
>> Is there something else that puts the ACL on/off that the udev init
>> script?
>
> No, the udev script should be the only one. The intention is that the
> user who has the current foreground console gets those extra ACL
> privileges, and other users get them revoked if they loose the
> foreground console (i. e. for user switching, etc.). This ensures that
> hardware that you plug in gets activated for the "current" user.

Oh, that explains a lot. If the ACL also forbids users to shutdown the  
computer unless they are the only user logged in and their console is  
active?

These lines in syslog are probably related?:
Mar 17 21:40:42 shuttle console-kit-daemon[874]: WARNING: Could not  
determine active console
Mar 17 21:40:42 shuttle console-kit-daemon[874]: WARNING: Error  
waiting for native console 4 activation: Invalid argument


> Under which circumstances are they off for you?

It occurs randomly. ACL might be off right from boot or after using  
the computer for some time. 75% of the time ACL is on and works just  
fine.

More details in the bug report itself:

https://bugs.launchpad.net/ubuntu/+bug/537596

-- 
Otto Kekäläinen
www.sange.fi