I am on Ubuntu 16.04 and I have this network card: https://www.tp-link.com/uk/products/details/cat-11_Archer-T6E.html
With kernel 4.14.x everything is working just fine. But when upgrading to 4.15.x or 4.16, I can not see any wifi connections. But I can get a temporary connection through my phone's usb.
lspci -knn | grep Net -A2 returns
04:00.0 Network controller [0280]: Broadcom Corporation BCM4360 802.11ac Wireless Network Adapter [14e4:43a0] (rev 03)
Subsystem: Broadcom Corporation BCM4360 802.11ac Wireless Network Adapter [14e4:0619]
Kernel modules: bcma
When I try to do modprobe wl
modprobe: FATAL: Module wl not found in directory /lib/modules/4.16.0-041600-generic
I have tried reinstalling bcmwl-kernel-source
sudo apt purge bcmwl-kernel-source
sudo apt-get install --reinstall linux-headers-generic
sudo apt-get install bcmwl-kernel-source
But this leads to
The following NEW packages will be installed:
bcmwl-kernel-source
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 1,544 kB of archives.
After this operation, 8,064 kB of additional disk space will be used.
Get:1 http://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 (2,774 kB/s)
Selecting previously unselected package bcmwl-kernel-source.
(Reading database ... 499695 files and directories currently installed.)
Preparing to unpack .../bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu1~1.2_amd64.deb ...
Unpacking bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~1.2) ...
Setting up bcmwl-kernel-source (6.30.223.271+bdcom-0ubuntu1~1.2) ...
Loading new bcmwl-6.30.223.271+bdcom DKMS files...
First Installation: checking all kernels...
Building only for 4.16.0-041600-generic
Building for architecture x86_64
Building initial module for 4.16.0-041600-generic
ERROR (dkms apport): kernel package linux-headers-4.16.0-041600-generic is not supported
Error! Bad return status for module build on kernel: 4.16.0-041600-generic (x86_64)
Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information.
modprobe: FATAL: Module wl not found in directory /lib/modules/4.16.0-041600-generic
update-initramfs: deferring update (trigger activated)
Processing triggers for initramfs-tools (0.122ubuntu8.11) ...
update-initramfs: Generating /boot/initrd.img-4.16.0-041600-generic
And here is the output of /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log
The answer is quite obvious. The Broadcom proprietary drivers don't build for the latest kernels.
Also the 4.15 and 4.16 kernels are not officially supported by Ubuntu.
You can try the driver from the 18.04 Ubuntu release http://mirrors.kernel.org/ubuntu/pool/restricted/b/bcmwl/bcmwl-kernel-source_6.30.223.271+bdcom-0ubuntu4_amd64.deb
It may build for the 4.15 kernel.
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