Comment # 14 on bug 1193250 from Thomas Zimmermann

(In reply to Thomas Zimmermann from comment #12)
> Having /etc/X11/xorg.conf on the installer system blocks Xorg from reading
> other configuratoion files. The X server therefore fails to detect HyperV
> devices (and possibly others), which are configured via /run/X11/xorg.conf.d/

This was supposed to go into bug 1193614.