[dricky]

I'm an Ubuntu newbie with J3455. Just installed the latest ubuntu 17.10 with kernel version 4.13.
Right now I'm having major problems with it.
1, kodi lack audio passthrough option. It's missing the toggle field.
2, hardware decoding is not working, my cpu is at 30-50%
3, playback flickering

I guess I will try to update to kernel 4.14 but I doubt it helps because even with 4.13 those basic things listed above shouldn't be a problem.
I would love to use LibreELEC but I still need to bittorrent 24/7 on the same HTPC. I'm assuming LibreELEC can't run any app other than kodi, correct me if I'm wrong.

For number 2 I would be looking for answers on Ubuntu forums to figure out if you have everything needed to ensure hardware acceleration works. Generally I find these forums rather unhelpful for any linux os other than libreelec.

You need the vaapi driver installed and can verify whether its installed and functioning with vainfo.

To download the iilegal copies of the movies you wanna watch?

Yea cause bittorrent isn't used for anything legitimate at all?, lol