Upgrade to 16.04 breaks Wifi on Dell XPS 13 (9343)

Ubuntu 15.x was working great on my Dell XPS 13. After upgrading to 16.04 it appears the drivers for the Broadcom BCM4352 Wireless Network Adapter are not loaded.

lshw -C network says the network is UNCLAIMED

There are now entries in the modprobe.d blacklisted file for Broadcom.

Any help is appreciated.

P.S. I dual boot to Win10. The network is fine there.

3 Answers

Disabling secure boot in the BIOS solved the problem for me. (found answer on dell forums: )

It was working on 16.04 until Kernel 4.4.0-21. I don't really want to disable secure boot, so am hoping for a fix. If applicable, please mark the bug as affecting you, then it might receive some attention. The Ubuntu bug is:

What I get on my 9350 with the Broadcom BCM4350 is slightly different, just fails to list the WiFi adapter in network-manager and fails to connect. But I can do

service network restart && service network-manager restart

and it will establish a connection. (driverversion=7.35.180.119 firmware=01-e791c176)

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