Wifi issue

The BCM4312 should either work with the kernel modules b43 or with the broadcom-wl-dkms. So did you install the b43-firmware-classic? Did the install work?

Lets try removing the broadcom-wl-dkms and see what happens.

sudo pacman -R broadcom-wl-dkms

Reboot and then post the output of these commands from the terminal.

lspci-k

and also

lspci -vnn -d 14e4:

When posting the output you can copy and paste the output from the commands here and put three ~~~ symbols before and after what you paste here.

Edit: If you look at this post here and read through you will see it is the same BCM4312 chip and i got it working with the broadcom-wl-dkms by removing the b43 firmware so well see…