Comment 6 for bug 874241

The way the login display manager should look is now defined in the Design team multimonitor specification. Rather than mirroring (which causes this bug) lightdm needs to set the screens to extended, with the primary screen showing the login and the secondary showing a logo.

It probably makes sense to leave the X to the upstream default of mirroring, and tie in with the settings daemon stuff. We can evaluate if a more direct link to libxrandr-utils might make sense later.