I'm using Ubuntu on my laptop HP Compaq nc8430. I have it also connected to external monitor Belinea b.display 22" wide. Graphic card: Ati Mobiliti Radeon X1600.
Here is my problem. I'm using only external monitor, because laptop is always closed. I managed to display it and work correctly. However, sometimes it happens that when I start laptop from sleep it doesn't work. So far, I have managed somehow to correct it. But not today. I woke up today and it doesn't work. Both monitors are now set up like they are next to each other, so you can drag things form one to another.
Could you please help me to understand and correct why it keeps changing, why it cannot stay as it is?
How do I make it in a way that I can see everything only on my external monitor.