Comment 12 for bug 1724863

I tried to install the latest bcmwl-kernel-source and got the following ...

sudo apt install bcmwl-kernel-source
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be upgraded:
  bcmwl-kernel-source
1 upgraded, 0 newly installed, 0 to remove and 282 not upgraded.
Need to get 1,544 kB of archives.
After this operation, 5,120 B of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 bcmwl-kernel-source amd64 6.30.223.271+bdcom-0ubuntu1~1.2 [1,544 kB]
Fetched 1,544 kB in 0s (5,683 kB/s)
(Reading database ... 177392 files and directories currently installed.)
Preparing to unpack .../bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu1~1.2_amd64.deb ...
Removing all DKMS Modules
Done.
Unpacking bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~1.2) over (6.30.223.271+bdcom-0ubuntu1~1.1) ...
Setting up bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~1.2) ...
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
Building only for 4.13.0-26-generic
Building for architecture x86_64
Module build for the currently running kernel was skipped since the
kernel source for this kernel does not seem to be installed.
modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.13.0-26-generic/modules.dep.bin'
modprobe: FATAL: Module wl not found in directory /lib/modules/4.13.0-26-generic
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.122ubuntu8.8) ...
update-initramfs: Generating /boot/initrd.img-4.10.0-28-generic
W: Possible missing firmware /lib/firmware/i915/kbl_dmc_ver1_01.bin for module i915