Dual display, non-mirrored

[Lars Noodén]

I can plug in a second display but I only get the option to mirror the
displays.

	LXDE->Preferences->Monitor Settings->Quick Options

The display is

	product: 	Seymour [Radeon HD 6400M/7400M Series]
	vendor: 	Advanced Micro Devices, Inc. [AMD/ATI]

With xrandr, I'm only finding one display:

	$ xrandr -q
	Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 16384
	x 16384
	LVDS connected 1680x1050+0+0 (normal left inverted right x axis
	y axis) 331mm x 207mm
	   1680x1050      59.9*+
	...

As far as I know, xrandr has to find the second display somehow before I
can do side-by-side.

What do I need to add or change to get side-by-side displays?

Regards,
/Lars