Wireless/audio not working on Dell Vostro 15 5590 with Ubuntu 18.04.3 LTS

Solution 1:

I manage to solve it. I have the exact same configs as yours and I've been through the same situation. I noticed

• kernel 5.0.0-37-generic - wifi adapter not working, sound working
• kernel linux-oem-osp1 - wifi adapter working, sound not working

First, I plugged in the good old ethernet cable and went back to kernel 5.0.0-37-generic. You can boot another kernel in the grub menu and make it the default. So, sound is on.

Secondly I tried lots of ways to make the wifi adapter work, this was the only one that really did it.

$ sudo add-apt-repository ppa:canonical-hwe-team/backport-iwlwifi
$ sudo apt-get update
$ sudo apt-get install backport-iwlwifi-dkms
$ reboot

not sure if this is the optimal way, but now wifi and sound are working.

I'll start my research about input audio now, I'll come back and edit if I somehow get it working.