Re: Low resolution projector on macbook 5,5
i had very much pain too, MBP5.1 here, karmic koala.
i realised that every time the beamer is hanging from the ceiling, thus an extension vga-cable is used, the nvidia driver cannot not read edid infos. it appears that many extension cables have less pins that that the beamer's connector has. instead i never had any trouble using small portable beamers directly connected with their cable to the laptop.
Lo runs Kubuntu 9.10-amd64 on a MacBookPro 5.1, and feels Karmic :~)