Plex on Linux Mint not seeing WinTV dualHD tuner

I am trying to install the WinHD dualHD tuner on my Linux Mint computer. Even though I installed the Hauppage PPA and even tried building a v4l framework, Plex still does not see my tuner. What am I missing?

I have it working on mint, without the hauppage ppa. For me it was getting the correct kernel.
uname -a
Linux nasty 4.10.0-21-generic #23~16.04.1-Ubuntu SMP Tue May 2 12:57:17 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

4.10 is the latest provided by mint

giving the following output.

 lsusb -v -d 2040:0265

Bus 003 Device 002: ID 2040:0265 Hauppauge
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x2040 Hauppauge
  idProduct          0x0265
  bcdDevice            1.00
  iManufacturer           3 HCW
  iProduct                1 dualHD
  iSerial                 2 0013909791
  bNumConfigurations      1
  Configuration Descriptor:

Hope that helps a little, worth running w_scan to see if the tuner is being picked up, before trying in plex.

w_scan -ft -c GB

I now have HD working for linux. The latest version from here https://github.com/b-rad-NDi/Ubuntu-media-tree-kernel-builder
I am using the 4.10 flavour. I have both tuners working, and HD recordings. DVB-T2 works
Many thanks to https://github.com/b-rad-NDi