Laptop Acer TM 7720 with video adapter ATI Mobility Radeon HD 2400 "persistently" did not wish to deduce the image on full screen. On to edges stay dark strips. The reason - truncated Catalyst complete with the native driver (without a scaling option).
The new driver is not present either at Acer, or at ATI.
To solve a problem has helped utility HD Mobility Modder (http://www.driverheaven.net/modtool.php) which "converts" any (almost any) Desktop drivers ATI in version Mobility. To me has helped, has received new Catalyst with scaling function, the image is deduced now on all screen.