Bug#982158: xfce4-session-logout --suspend

[Celejar <celejar@gmail.com>]

I should have reported that the command bound to the keyboard shortcut
is "xfce4-session-logout --suspend". When run from the command line, I
get a popup window with the message 

"Received error while trying to log out
GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Type of
message, "(yb)", does not match expected type "(b")""

and the command line message:

"Received error while trying to log out, error was
GDBus.Error:org.xfce.SessionManager.Error.Failed: Failed to lock the
screen."

Celejar