Do the drivers generate interrupts?
 

As simple as that, do the drivers (Ex: Graphics card driver) cause interrupts? Or is that a function limited to the modules...?

In the case they don't, for example if we change the background color, who interrupts the cpu to tell it to call the graphics card in order to change the background, its clear the graphics card doesn't know it has to change the background since that function was called from the os...

I think the card doesn't know anything about the background also. it will show you whatever is told to be displayed. There is a software (app?) running on the OS which will handle windows, desktop, decoration, focus, backgrounds and will tell the hardware what to do. This app is the X server on linux.