Broadcom BCM4352 not showing all wifi networks

Question

I have a 2015 Dell XPS 13 (9343) with Ubuntu 16.04. Wifi is working using bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu8 and everything works fine except that I cannot see all wifi networks around, in particular the one I want to connect to.

Using an old TP-LINK usb dongle I can connect normally.

I think the problem can be the router mixing up the b/g/n and ac/a/n fequencies.

Strange thing is that while I was using Ubuntu 14.04 everything worked fine.

Any suggestion about how to solve this issue?

Answer 1

There is a temporary workaround here

But it has to be executed after each reboot.