Guest login fails on PCs missing updated broadcom wifi drivers

[red-stripe]

Guest login fails on PCs missing updated broadcom wifi drivers
Error from logs:lightdm[990]: wlp8s0: ERROR while getting interface flags: No such device

Probably solution:
As per ubuntu docs install updated broadcom drivers on T3 PCs. (bcmwl-kernel-source)

This should be incorporated into the guest login script