That's not really the case. For more information on the situation of Broadcom drivers on my system I will refer you to my Ask Ubuntu question:
https://askubuntu.com/questions/1012880/suddenly-the-wi-fi-broadcom-5 -ghz-interface-is-shown-out-of-range-permanently/1021178#1021178 You are true that when installing either kernel 4.15 or 4.16 I get this dkms error: Running depmod. update-initramfs: deferring update (hook will be called later) Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.15.0-13-generic /boot/vmlinuz-4.15.0-13-generic run-parts: executing /etc/kernel/postinst.d/dkms 4.15.0-13-generic /boot/vmlinuz-4.15.0-13-generic ERROR (dkms apport): kernel package linux-headers-4.15.0-13-generic is not supported Error! Bad return status for module build on kernel: 4.15.0-13-generic (x86_64) Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information. [...] Setting up linux-image-extra-4.15.0-13-generic (4.15.0-13.14~16.04.1) ... run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.15.0-13-generic /boot/vmlinuz-4.15.0-13-generic run-parts: executing /etc/kernel/postinst.d/dkms 4.15.0-13-generic /boot/vmlinuz-4.15.0-13-generic ERROR (dkms apport): kernel package linux-headers-4.15.0-13-generic is not supported Error! Bad return status for module build on kernel: 4.15.0-13-generic (x86_64) Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information. [...] And when installing kernek 4.13 I get no error. I had similar dkms error as well for the nVidia Graphics Drivers not up to date i.e. not build with the appropriate patches for the target kernel. So I guess there might be some problem lingering with the bcmwl-kernel- source driver. Right now I am in kernel 4.13 and typing: $ cat /etc/modprobe.d/* | egrep 'bcm' # Warning: This file is autogenerated by bcmwl. All changes to this file will be lost. blacklist bcm43xx blacklist bcma $ So bcma and bcm43xx are currently blacklisted. And I have my wi-fi connection dropped at random ... several times an hour. Still your answer does not explain why the network adapter is 'UNCLAIMED' in 4.15 ? while it is seen in 4.16 ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1760108 Title: Broadcom B43 Wireless Driver Not Functional after Update to Linux Kernel 4.15 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1760108/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
