gnome-power-manager: (root) GNOME interactive logout because the power button has been pressed

gnome-power-manager: (root) GNOME interactive logout because the power button has been pressed

Error:
Apr 28 18:31:28 test gnome-power-manager: (root) GNOME interactive logout because the power button has been pressed
Apr 28 18:31:57 test gnome-power-manager: (root) GNOME interactive logout because the power button has been pressed
Even though there is no one has pressed the power button, this message is shown sometimes and then power goes down.

Cause:
It is suspicious that there is an unknown bug on gnome-power-manager.

Solution:
1. Remove button module :   # modprobe -r button
2. Registering the button module on blacklist in /etc/modprobe.d/blacklist.conf
# vi /etc/modprobe.d/blacklist.conf
     blacklist button

OR
Edit /etc/acpi/events/power.conf file.
Comment this line : #action=/bin/ps awwux | /bin/grep gnome-power-manager | /bin/grep -qv grep || /sbin/shutdown -h now
Or you can change the command to something not Harmful.