[Nouveau] hot plug second monitor

[James]

I have a video card with 2 outputs.
I don't usually have a monitor on the second output (HDMI).
I have to reboot if want to use a second monitor.
Is there a way to force lubuntu to rescan for the second monitor.

[ 1.507056] nouveau [ DEVICE][0000:01:00.0] Chipset: GK107 (NVE7)
[ 1.507057] nouveau [ DEVICE][0000:01:00.0] Family : NVE0

Apparently the nvidia driver allows a second monitor to be plugged in (I 
don't know how to install those drivers in lubuntu).