multiple video cards & monitors

[idee]

I have a clean install of Lubuntu 15-10. I would like to use both video cards across 3 monitors. (2 on one, 1 on the other). It identifies both cards (see below), but seems to only be accessing a single monitor per card. Each card can support 2 monitors, so in theory should be able to drive 4 monitors. Any help is appreciated.

Additional info. I installed Xubuntu first. It did see and set up both video cards and all three monitors fired up right away. I had some issues with the mouse freezing that we couldn't resolve so I reformatted and installed Lubuntu. The mouse issues are gone with Lu, so all is great here. What is the difference between the two systems? What settings or commands can be altered to find the additional monitor? Does anyone have experience with the X.Org Nouveau driver verses the NVIDIA driver? Would that make a difference?

lubuntu@lubuntu:~$ sudo lshw -C video
  *-display               
       description: VGA compatible controller
       product: G86 [Quadro NVS 290]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nouveau latency=0
       resources: irq:32 memory:fa000000-faffffff memory:d0000000-dfffffff memory:f8000000-f9ffffff ioport:3100(size=128)
  *-display
       description: VGA compatible controller
       product: GT216 [GeForce GT 220]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:20:00.0
       version: a2
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nouveau latency=0
       resources: irq:33 memory:f2000000-f2ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:1100(size=128) memory:f3080000-f30fffff

thanks for the help if anyone can chime in here.

[idee]

anyone?

[James_Creasy]

I've had some problems getting monitors to work right, some symptoms documented here: http://ubuntuforums.org/showthread.php?t=2257192

[idee]

I've had some problems getting monitors to work right, some symptoms documented here: http://ubuntuforums.org/showthread.php?t=2257192

Thanks This seems to be a pretty quiet forum.

From reading, it looks like the best option may be to install the Nvidia driver as opposed to the Nouveau. If I do that and it hangs the system, how do I switch it back? Is there a safe mode that will allow me to change it back?