Xubuntu display layout is not saved

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http://askubuntu.com – I have a laptop running Xubunu 12.10 with an HDMI display attached. When I log off or reboot, and then log back in, I need to reapply my display arrangements in ARandR when I log back in (oddly, the resolutions are maintained, but not the placement). My display arrangements also break when an HDMI switch is used. What can I do to fix this? (HowTos)