shutdown (physical) button

[Jean-Christophe]

I succeed making the panel power button working, but I have another problem:
When I press my laptop power button, that powers off the computer, with 
no popup, and not saving the session.
So I have just to modify my /etc/acpi/powerbtn.sh to make him launch 
xfsm-shutdown-helper (or another command, maybe) with the right user 
(this script is launched as root when power button is pressed)
Any idea about what could be this command?

Regards
Jean-Christophe