Comment # 5 on bug 1083869 from Michal Srb

(In reply to Fabian Vogt from comment #4)
> > However, for some reason GDM does not include the display number in its
> > xauth entries. So those xauth entries would be used for every display
> > number.
> 
> This is valid.

Yeah, I got that confirmed from Keith on xorg's mailing list too.

> > * Changing the merge policy in xauth.

I'll work on a fix for xauth.
Additionally xauth will need to sort the numbered entries before the
non-numbered to make this work reliably. I think it should be safe to do so, so
I'll do that too.