I installed kernel 5.3.0-050300 and sound and microphone works fine:
Linux G3-3590 5.3.0-050300-generic #201909152230 SMP Sun Sep 15 22:32:54 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
I'm using Ubuntu 18.04.04 on Dell G3 3590-A20P.
I installed kernel 5.3.0-050300 and sound and microphone works fine:
Linux G3-3590 5.3.0-050300- generic #201909152230 SMP Sun Sep 15 22:32:54 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
I'm using Ubuntu 18.04.04 on Dell G3 3590-A20P.