no wlan after install of 16.04 (dell xps15)

[Colin Law]

On 9 April 2016 at 08:44, Colin Law <clanlaw at gmail.com> wrote:
> On 9 April 2016 at 08:15, robert rottermann <robert at redcor.ch> wrote:
>> Hi there,
>> I installed ubuntu 16.04 on my dell xps 15.
>> Unfortunately wlan does not work any more.
>>
>> no wlan is offered in the system settings, and
>> and no wlan device is in the /etc/network/interfaces.
>>
>> root at lappi:/home/robert# cat /etc/network/interfaces
>> # interfaces(5) file used by ifup(8) and ifdown(8)
>> auto lo
>> iface lo inet loopback
>
> That is normal on system managed by Network Manager.
>
> If you click on the network icon in the top panel what does it say about wifi?
>
> What do you see if in a terminal you run
> grep wlan /var/log/syslog

Another thing to try is booting off a live 16.04 image and seeing
whether wifi works then.

Colin