Thanks for the advice, but I made sure b43 was removed, and wl was already on the list.
Well, the Atheros WLAN module arrived today and I installed it: works like a charm. I guess the best solution is not to use a BCM43142! Thanks for all the help, everyone!
I’m glad to see you settled down. Cheers.
Thanks!!! Worked for me
Linux xxxxxx-acer 4.19.36-1-MANJARO #1 SMP PREEMPT Sat Apr 20 22:05:46 UTC 2019 x86_64 GNU/Linux