no wlan after install of 16.04 (dell xps15)

[Colin Law]

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

Colin


>
> this is what lspci displays:
>
> root at lappi:/home/robert# lspci -vnn -d 14e4:
> 06:00.0 Network controller [0280]: Broadcom Corporation BCM4352 802.11ac
> Wireless Network Adapter [14e4:43b1] (rev 03)
>     Subsystem: Dell BCM4352 802.11ac Wireless Network Adapter [1028:0019]
>     Flags: bus master, fast devsel, latency 0, IRQ 18
>     Memory at f7a00000 (64-bit, non-prefetchable) [size=32K]
>     Memory at f7800000 (64-bit, non-prefetchable) [size=2M]
>     Capabilities: [48] Power Management version 3
>     Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
>     Capabilities: [68] Vendor Specific Information: Len=44 <?>
>     Capabilities: [ac] Express Endpoint, MSI 00
>     Capabilities: [100] Advanced Error Reporting
>     Capabilities: [13c] Device Serial Number c4-8e-00-ff-ff-00-00-01
>     Capabilities: [150] Power Budgeting <?>
>     Capabilities: [160] Virtual Channel
>     Capabilities: [1b0] Latency Tolerance Reporting
>     Capabilities: [220] #15
>     Kernel driver in use: bcma-pci-bridge
>     Kernel modules: bcma
>
> any ideas what I could do?
> thanks
> robert
>
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