I have a Macbook Pro 13" (7, 1) and when I updated my kernel version to 4.9.9 (F25), my broadcom wireless adapter is no longer detected. I have since updated to the latest kernel and have gotten the same result. As of now, I am currently operating at the kernel version prior to 4.9.9 (4.8.6-300.fc25.x86_64 ) and I am able to use WiFi with no issues. I have tried uninstalling and reinstalling the broadcom -wl driver to no avail. I narrowed the issue down to the kernel simply by updating the kernel only and after reboot, wireless was gone.
Could you run lspci on 4.8.6 kernel to determine what wifi adapter you have. Also the Broadcom-wl driver is not well maintained for newer kernels.
02:00.0 Network controller: Broadcom Limited BCM4322 802.11a/b/g/n Wireless LAN Controller (rev 01)
Any progress? Do you require any other information from me about my machine? Still on an old kernel...
I suspect the broadcom-wl driver does not work for 4.9.9. It needs to compile parts of the driver whenever you move to a newer kernel (this is known as DKMS framework [1]) and I expect that compilation fails. Not sure where you can find the logs to confirm that. Maybe the link below has that info. [1] https://help.ubuntu.com/community/DKMS
I got the same with a PC. The Broadcom wireless driver stopped working after I upgraded the kernel from 4.6.x to 4.7.x. I've done some research and put it all here: https://github.com/chaws/broadcom-wl. I got it working for maybe a minute or two, but then the kernel panic'd. I need to get back on that, any help is welcome.