[LightDM] Greeter and other clients cannot connect to X server

[Guido Berhoerster]

Hi,

I'm getting number of reports of where lightdm 1.8.3 in openSUSE
13.1 successfully starts an X server but clients such as tools
run as root from the greeter-setup-script and the greeter itself
for some reason cannot connect to the X server.  This is some
sort of race condition which does not occur every time and I
haven't been able to reproduce this at all.  I'm also not sure
whether this is a problem with lightdm, X, the openSUSE display
manager init script or if systemd is interfering. However, since
it doesn't seem to happen with other display managers I have the
suspicion lightdm is at fault.
Any ideas how to debug this further?
A downstream report with logs can be found at
https://bugzilla.novell.com/show_bug.cgi?id=846832

Thanks,
-- 
Guido Berhoerster