With Ubuntu, Canonical has had notable success in convincing people to switch from other platforms, but potential Ubuntu users are still running into trouble in several areas. Having spent some time on Canonical's forums, I've identified 10 points that seem to be common sticking points for new users -- that is, problems that have the potential to prevent a new user from adopting Ubuntu in the long term. These problems span the entire Ubuntu experience, but they all have two things in common: they are all serious enough to evoke the dreaded "I tried Linux but it didn't work" excuse, and they are all solvable.
Ubuntu is still bad at properly detecting and setting up the display. Once it's gone wrong, there isn't much you can do from the GUI setup tool -- it either lies about your screen settings or offers inappropriate screen modes. Anyone for 640x480@52Hz on a 19-inch CRT?
This is probably the most frequently reported complaint on the beginner forum. Other operating systems can set up the screen, so why can't Linux?