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I have a dual-head NVIDIA (GeForce GT520) graphics card and an onboard Intel graphics controller. I’ve been using two monitors connected to my NVIDIA card which has worked fine but now I got a third monitor which I have connected to the on board card and I’m wondering how I can make it to be part of my display configuration (in Plasma).

I do see the the adapter in my system as it is shown as “2nd Generation Core Processor Family Inegrated Graphics Controller (Intel Corporation)” with what seems like 'video-linux' drivers associated. I see this in Plasma under Hardware Configuration.

Some further details about my setup:

sudo lshw -C video
  *-display                 
       description: VGA compatible controller
       product: GF119 [GeForce GT 520]
       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=nvidia latency=0
       resources: irq:43 memory:fa000000-faffffff memory:d0000000-d7ffffff memory:d8000000-d9ffffff ioport:e000(size=128) memory:c0000-dffff
  *-display
       description: Display controller
       product: 2nd Generation Core Processor Family Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm bus_master cap_list
       configuration: driver=i915 latency=0
       resources: irq:41 memory:fb400000-fb7fffff memory:c0000000-cfffffff ioport:f000(size=64)

Now, I can right click onto 'video-linux' and it gives me options to “remove” or “reinstall” but I haven’t selected reinstall as I don’t want to risk, losing my display by “trying around”. Can I add the Linux card to /etc/X11/xorg.conf instead? How do I do that? And will it take precedence over configuration in /etc/X11/xorg.conf.d/ or is that wehre I add my config instead?

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