Experienced the same. WIFI no longer working after upgrading on Dell XPS
13 9343 to Ubuntu 16.04 LTS.
SecureBoot is enabled (and will remain so)
lspci -nnk | grep 0280 -A2
02:00.0 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]
Kernel modules: bcma, wl
sudo lshw -C network
*-network UNCLAIMED
description: Network controller
product: BCM4352 802.11ac Wireless Network Adapter
vendor: Broadcom Corporation
physical id: 0
bus info: pci@0000:02:00.0
version: 03
<snip>
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to bcmwl in Ubuntu.
https://bugs.launchpad.net/bugs/1572659
Title:
bcmwl driver does not work with kernel 4.4.0-21 when secure boot
enabled
Status in bcmwl package in Ubuntu:
Confirmed
Bug description:
After updating ubuntu 16.04 to latest kernel 4.4.0-21, bcmwl driver
(package bcmwl-kernel-source) does not load and wifi not work.
sudo modprobe wl
modprobe: ERROR: could not insert 'wl': Required key not available
If I boot with kernel 4.4.0-18 - bcmwl loads normally and wifi works.
If secure boot disabled - bcmwl loads normally with kernel 4.4.0-21
and wifi works.
---
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
InstallationDate: Installed on 2015-12-02 (140 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
NonfreeKernelModules: wl
Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu8
PackageArchitecture: amd64
ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
Tags: xenial
Uname: Linux 4.4.0-18-generic x86_64
UpgradeStatus: Upgraded to xenial on 2016-03-03 (47 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1572659/+subscriptions
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