I too can't shutdown by the power button, don't have that file or folder, with Lubuntu 15.04. I ran:
sudo apt-get update sudo apt-get upgrade sudo apt-get dist-upgrade sudo apt-get autoremove sudo apt-get clean reboot xfce4-power-manager --debug
with no results. The debuger ran tthrough a day & night and just keeps going, so I terminated the process.
I too can't shutdown by the power button, don't have that file or folder, with Lubuntu 15.04.
I ran:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo apt-get autoremove
sudo apt-get clean
reboot
xfce4-power-manager --debug
with no results. The debuger ran tthrough a day & night and just keeps going, so I terminated the process.