I have an issue when I try to work with dual monitor:
Ihave a HP dv7 with ati Radeon HD 5600 and a Benq external monitor.
I have instaled the properietary ATI drivers
When I plug my external monitor, the system freeze with balck screen with just the mouse pointer showed but freezed too. If I try to restart I can see the dual monitor working buit just mirrored, if I try to move to not mirrored monitors, the system freeze another time with black screen and the mouse pointer freezed.
The same issue I experiment even if I try, with my second monitor unplugged, to change the resolution of my laptop monitor
Any idea? please help Thanks in advance