I also have this same problem and afterwards I get a message saying:
Display driver R300 stop responding and has recovered.
The video card is integrated into the main board on this notebook, and it doesn't have it's own memory.
Anyone got any ideas on how to solve it?
It can be very frustrating, I just gave up and don't watch full screen anymore!
Amilo Li 1718, Core Duo, Vista Home Premium, 896MB RAM +128MB used for Graphics!!, 98.1GB HDD, 12GB used for System Recovery! For £349.99!