On Fri, 17 Jun 2016 16:21:35 +0200, Emninger wrote:
> Thanks to my installation hassle i had an a bit close look to some
> installed modules. So i saw, that with the basic install + X (i did not
> install any specific desktop, but only with the --no-install-recommends
> option: xorg, jwm, menu, lxdm) is already pulled in the gnome-polkit.

ITYM policykit-1-gnome.

> I do not know, if a polkit is absolutely needed,

If you want session management you'll probably need some
kind of polkit. What would happen (package-wise) if you
tried to remove policykit-1-gnome?

> but if so, wouldn't
> the lxpolkit be preferable (because smaller)?

Probably. NB, lxpolkit is a virtual package that actually
pulls in lxsession.

HTH, Regrads
Urban