Comment 8 for bug 799754

I think this can become troublesome when you need to change things like autologin. For example ubquity will write out the autologin settings to /etc/lightdm/lightdm.conf and any userspace tool for changing these settings would likely be looking there too.

So if this solution is accepted, then those tools will all need to be adjusted too.

I think a better solution would be to allow lightdm to parse the standard conf by default, and then parse the vendor conf for any "override" values for things in the standard conf. That keeps all other tools just having to look at a single file.