I've recently expirience a proble with the Dell D630 Latitude noteboks at my work.
When I connect an external projector and I press the fn+f9 key in order to lone view in the projector it wont't work. Instead I've got to change my notebook resolution to 1024x768 in order to work properly.
Before everything happened automatically: when I pressed the fn+f9 key my laptop would automatically change it's resolution to 1024x768. Now I've got to do it manually.
The Graphics Driver is Nvdia Quadro.
The issue is quite annoying as I've got several partners that work with the same modell.