I have bought Dell Vostro with Ubuntu pre-installed. It was 14.04 LTS and it's kernel didn't support my Intel Wireless 3165 adapter, so wifi just refused to connect.
I installed Ubuntu 16.04 LTS with kernel 4.4 but it did'nt solve my problem. Now my laptop connects to wifi, but then the whole wifi service is falls down (wifi icon not visible in status bar)
I cannot establish wired connection as well.
Hopely, you will help me. I can send all outputs of tests if needed. Ethernet/Wireless adapters are not soft or hard blocked and I have no wifi switcher.
Thank you in advance.