Dear Maintainer,

when using xfce4-power-manager as a standalone application without the XFCE
desktop environment (for example with LXDE or Awesome), it does not ask for
shutdown when battery power is critically low and the user has configured it to
ask in this case. This is caused by xfpm_manager_ask_shutdown(...) in
xfpm-manager.c, which just tests if the session manager is running, and if not,
just returns without an action. This probably leads to confusion, because the
configuration dialog still allows the user to select "Ask" as the preferred
action in case of critical power.

I'm currently imagining three possible solutions for this unexpected behaviour.
First, one could test if the session is managed by XFCE in the configuration 
dialog, and prohibit the user from selecting "Ask" as the preferred action in 
case of critical power, but this is surely the least favorable solution. A 
better alternative would be to simply warn the user through a popup notification
(or libnotify) that the power is just about to die and that data may be lost. 
The best solution I currently have in mind is to implement a warning dialog 
like the one xfce4-session displays in that case, and just let the power manager
do a clean shutdown (hibernate, suspend) by itself, as the infrastructure for that already exists (see xfpm_manager_shutdown(...) and xfpm_power_sleep(...)). 

Thanks,
-- Roland