>graphics are unusably slow. When the monitor of the laptop is enabled, >grahpics are at normal speed.
I can't answer your questions, but have you considered using this as a reason to get used to using a dual-head set-up? FWIW, this is like the set-up I've been using for years now with my MBP: the laptop screen acts as a 2ndary screen when I'm at one of my fixed work stations, one I use for documentation windows, my email client's main window etc. R.
