I don't know if this is a bug or not, but a workaround is to simply restart X (Ctrl-Alt-Backspace) once you have switched the monitor on. When X restarts, it will use the higher resolution ... at least that is how it works for me.
-- [Edgy] Resolution set to 800x600 if no monitor connected https://launchpad.net/bugs/79057 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
