OK, so according to what I’ve seen online, the correct driver for the adapter, is
wl. But it’s not in use here:
So all I can recommend is blacklisting the current module:
sudo echo "blacklist bcma-pci-bridge" > /etc/modprobe.d/bcma-pci-bridge.conf
And then, before restarting, installing the
broadcom-wl-dkms from the
pamac install broadcom-wl-dkms
Very important is to ensure that during/at5 the end of the installation, no extra steps are given. If you’re unsure, provide the output here before restarting.
If no errors occurred, it should be safe to reboot.
It it’s still not working, post a
sudo inxi --admin --verbosity=7 --filter --no-host --width
…before uninstalling the drivers again.
If you need to have it working to do anything, just reverse the instructions for installing it:
pamac remove broadcom-wl-dkms
sudo rm /etc/modprobe.d/bcma-pci-bridge.conf
…and rebooting. Then you should, again, be using the current driver which, as you say, is slow.