Comment # 5 on bug 1062068 from Michal Srb

(In reply to Franck Bui from comment #4)
> > * It is not possible to recognize stop from restart just by listening on
> > dbus. It was rather ugly way to detect it anyway.
> 
> I'm wondering if this couldn't be implemented though...

I guess it could be. If systemd-logind would send some signal saying "Hey I am
going away and not coming back any time soon.", we could listen for that.

It does not solve the case when systemd-logind crashes, but in my opinion we
shouldn't try too hard in that case. If such important component crashes, I
would expect anything can happen, so why should X server have some special
safety against it.

> You meant that if A.service has "BindsTo=B.service", A is stopped if B is
> restarted ?

With BindsTo I am observing this:
* If B is stopped, then A is stopped. Good, we want that.
* If B is restarted, then A is restarted. Bad, we don't want that.