I have spent about an hour trying to find a solution to this, if someone has an answer or a link to an answer I would appreciate it.
I just wiped my disk (formerly running 12.04 LTS) and installed 13.04. My dual displays were working fine in 12.04, but when 13.04 came up I lacked my second display in the settings menu and the primary display is labelled "laptop" (I am running on a desktop). The only thing i can find when searching for a solution is a stack of complaints about nvidia drivers breaking unity and fixes for that which seem to be removing the nvidia drivers... so while installing the nvidia drivers seems like a good solution... it doesn’t look like the best course of action.
I appreciate any help, if anything is needed from me in order to find a solution please let me know.