Power manager not able to suspend or hibernate

[Ralf Mardorf]

On Mon, 2014-02-03 at 09:22 +0100, wwp wrote:
> One instance with no option, as self-configured by Xfce:
> 
> $ ps -ef | grep xfce4-power | grep -v grep
> wwp      24906     1  0 08:47 ?        00:00:00 xfce4-power-manager

On my machine there it's also checked for the autostart, but I get

[rocketmouse at archlinux ~]$ ps -ef | grep xfce4-power | grep -v grep
rocketm+   748     1  0 20:07 ?        00:00:00 xfce4-power-manager --restart --sm-client-id 27ef8f061-604b-4e36-bf16-41052197e127
rocketm+   761     1  0 20:07 ?        00:00:00 xfce4-power-manager

I don't know if hibernate does work on my machine, it's a long time ago
that I tested it, IIRC last time I tested it, resume didn't work. It's
not important for me, since most of the times I use jackd as sound
server and it anyway doesn't work for suspend and hibernate.

The man page for xfce4-power-manager is weak. The sm-client-id seems to
be needed to save and restore an application session state. I don't have
knowledge about it and a brief Internet research didn't give much
information.