I recently upgraded my tvheadend (and possibly the linux kernel), but my tv tuner (WinTV-HVR-955Q) suddenly disappeared from the tv adapter list on tvheadend as follows:
https://images2.imgbox.com/6c/aa/bYYvkYgO_o.png
For the tv tuner drivers, I use this ppa called "b-rad/kernel+mediatree+hauppauge", and the kernel version atm is 4.15.0-43201901080420-generic. I'm no expert, but this ppa repository basically says
> The PPA will be updated once a week, or immediately upon new Ubuntu kernel release.
So, it might be that I actually upgraded the linux kernel (I'm not sure about it since I just used apt), but the repository has not actually been patched to this version? Can you give some advice?