Code review comment for lp://staging/~lightdm-gtk-greeter-team/lightdm-gtk-greeter/greeter-background

I've tested the latest changes in the branch. While it generally seems to work fine, it all depends on whether the user has set up his monitors correctly in Xorg. E.g. my work machine defaults to cloning/mirroring the outputs, so whatever I set in the greeters conf-file, I get a rather garbled output.

I'm wondering whether we shouldn't just handle the display layout within the greeter instead of relying on Xorg's default setup.

Also: how would the user change the default Xorg layout (without xorg.conf) easily for the greeter? (You mentioned xrandr before, but that's only within a user-session so it wouldn't affect the greeter, right?)