Hi,

On 08/24/2015 02:22 AM, adamdm wrote:
>> Hmmmmmm. Unsure.
>>
>> Did you log out and log in again to restart XFCE
>> since you installed the package?
>>
> Yes I've tryed but nothing..

Ahhh, this is so troublesome :-)

1. Do you have the "policykit-1" and the "policykit-1-gnome"
packages installed?

2. You can run the logout dialog shutdown operation manually
(beware, this might shutdown your system!):

~$ xfce4-session-logout --halt

Does that work? If not, does it emit an errmsg?

Kind regards,
T.