Realtek Wifi-adapter crashes whole system under Ubuntu 16.04
 

Hello everyone,

I am running Ubuntu 16.04 Finnish language. The problem is that I have Realtek USB wifi-adapter and for some reason Ubuntu crashes totally when I connect it to the computer. I have managed to set up wifi after Ubuntu reinstall and everything runs smoothly until today when problems came back as I turned the computer on. I have tried other USB adapter but the problem persists. Latest update activity is as follows:

Start-Date: 2017-02-26 21:58:14
Commandline: /usr/bin/unattended-upgrade
Install: linux-headers-4.8.0-39:amd64 (4.8.0-39.42~16.04.1, automatic), linux-image-4.8.0-39-generic:amd64 (4.8.0-39.42~16.04.1, automatic), linux-image-extra-4.8.0-39-generic:amd64 (4.8.0-39.42~16.04.1, automatic), linux-headers-4.8.0-39-generic:amd64 (4.8.0-39.42~16.04.1, automatic)
Upgrade: linux-image-generic-hwe-16.04:amd64 (4.8.0.36.8, 4.8.0.39.10), linux-generic-hwe-16.04:amd64 (4.8.0.36.8, 4.8.0.39.10), linux-headers-generic-hwe-16.04:amd64 (4.8.0.36.8, 4.8.0.39.10)
End-Date: 2017-02-26 22:00:59

I tried to start Ubuntu recovery and start network from there. The following occurs few times before everything crashes:

/etc/resolv.conf missing

Ethernet cable works fine.

Kimmo

So you need to regenerate your resolv.conf
then try again. Strange that it'd work wired and not wireless though

The problem is now solved. After install Linux updated kernel which didn't support my rather old USB Wlan adapters. I talked about this in Finnish Linux forum. I was given instruction to start Linux under older kernel and that solved problem. Changing to older kernel can be done by pushing right shift button during start. So now I am waiting when this bug is fixed in new kernel version.

Kimmo