Public bug reported:
Overview
========
After upgrading Xubuntu 17.04 to 17.10, wifi stopped working completely
Expected behaviour
==================
Wifi should continue to work after an OS upgrade
Actual behaviour
================
Wifi not available, no driver loaded
Analysis
========
System reports wifi as Broadcom Limited BCM4352 802.11ac Wireless Network
Adapter (rev 03), in Additional Drivers, Linux STA driver from
bcmwl-kernel-source is shown as selected
Attempting to reconfigure bcmwl-kernel-source gives an error:
geoff@monster:~$ sudo dpkg-reconfigure bcmwl-kernel-source
Removing all DKMS Modules
Done.
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
Building for 4.13.0-16-lowlatency
Building for architecture x86_64
Module build for kernel 4.13.0-16-lowlatency was skipped since the
kernel headers for this kernel does not seem to be installed.
modprobe: FATAL: Module wl not found in directory
/lib/modules/4.13.0-16-lowlatency
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.125ubuntu12) ...
update-initramfs: Generating /boot/initrd.img-4.13.0-16-lowlatency
cryptsetup: WARNING: target cryptswap1 has a random key, skipped
Processing triggers for shim-signed (1.32+0.9+1474479173.6c180c6-1ubuntu1) ...
Secure Boot not enabled on this system.
Looks like the upgrade didn't install the kernel headers which meant no
WIFI on reboot
Workaround
==========
Installing the appropriate kernel headers and reconfiguring bcmwl-kernel-source
fixed my system immediately
Connect wired Ethernet then:
sudo apt-get install linux-headers-$(uname -r)
sudo dpkg-reconfigure bcmwl-kernel-source
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubuntu-release-upgrader-core 1:17.10.7
ProcVersionSignature: Ubuntu 4.13.0-16.19-lowlatency 4.13.4
Uname: Linux 4.13.0-16-lowlatency x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: XFCE
Date: Sat Oct 21 19:53:58 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-09-23 (1123 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
Symptom: ubuntu-release-upgrader
UpgradeStatus: Upgraded to artful on 2017-10-21 (0 days ago)
VarLogDistupgradeTermlog:
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug artful dist-upgrade
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https://bugs.launchpad.net/bugs/1725609
Title:
no wifi after upgrading to 17.10
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