I ran into this bug with today's update to kernel 4.15.0-29. I had no problem previously using the 4.15.0-24 kernel. The bug reporter automatically directed me to this bug report. I see similar issues, where my wifi adapter seems to have disappeared. I have not yet tried the workaround.
The relevant part of the message: Setting up linux-modules-extra-4.15.0-29-generic (4.15.0-29.31~16.04.1) ... Setting up linux-image-generic-hwe-16.04 (4.15.0.29.51) ... Setting up linux-headers-4.15.0-29 (4.15.0-29.31~16.04.1) ... Setting up linux-headers-4.15.0-29-generic (4.15.0-29.31~16.04.1) ... /etc/kernel/header_postinst.d/dkms: Error! Bad return status for module build on kernel: 4.15.0-29-generic (x86_64) Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information. Setting up linux-headers-generic-hwe-16.04 (4.15.0.29.51) ... Setting up linux-generic-hwe-16.04 (4.15.0.29.51) ... Processing triggers for linux-image-4.15.0-29-generic (4.15.0-29.31~16.04.1) ... /etc/kernel/postinst.d/dkms: ERROR: Cannot create report: [Errno 17] File exists: '/var/crash/bcmwl-kernel-source.0.crash' Error! Bad return status for module build on kernel: 4.15.0-29-generic (x86_64) Consult /var/lib/dkms/bcmwl/6.30.223.271+bdcom/build/make.log for more information. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1757008 Title: Broadcom wireless drivers failed to build [error: implicit declaration of function ‘init_timer’] To manage notifications about this bug go to: https://bugs.launchpad.net/broadcom-sta/+bug/1757008/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs