Intel N3150 graphics not recognised in 16.04

I've just installed Ubuntu 16.04 LTS onto a Zotac ZBOX CI323. This ZBOX has an Intel Celeron N3150, with integrated graphics.

When I install Ubuntu 16.04 I see the 'Low graphics' waing. I had to add the nouveau.modeset=0 boot parameter to get past this. When I get to the Ubuntu Desktop I can see that the GPU hasn't been recognised correctly because the resolution is very low. lshw shows the following:

        *-display UNCLAIMED
             description: VGA compatible controller
             product: Intel Corporation
             vendor: Intel Corporation
             physical id: 2
             bus info: pci@0000:00:02.0
             version: 21
             width: 64 bits
             clock: 33MHz
             capabilities: pm msi vga_controller bus_master cap_list
             configuration: latency=0
             resources: memory:80000000-80ffffff memory:90000000-9fffffff ioport:f000(size=64)

16.04 is supposed to include the latest Intel drivers for Linux v1.4.0 (as described here). My keel version is 4.4.0-21.

I'm out of ideas on what the problem could be here. Is the integrated GPU in the N3150 not yet supported under Linux?