Thanks to Ozi i got two desktop independent logout/hibernate tools which
generally work fine (cb-exit and oblogout). But i have a problem when i
try the suspend/restart commands:

I get this error msg:

---
Error org.freedesktop.UPower.GeneralError: not authorized
---

The command in the above tools is:
----
dbus-send --system
--print-reply--dest="org.freedesktop.UPower" /org/freedesktop/UPower
org.freedesktop.UPower.Suspend
----

I googled and i found this:

https://bbs.archlinux.org/viewtopic.php?id=141337

and this:

http://forums.debian.net/viewtopic.php?t=114412

But i do not see, how to applicate the arch wiki solution to me
("Remove ck-launch-session from xinitrc, it's not needed any more and
the problem was because two sessions were started simultaneously, one
of which was inactive.") I've no .xinitrc (?)

Thanks in advance for any help.