I have a really old laptop and no Linux so far had drivers built-in for it. I also don't have access to the router, so I can only use wifi, and I do want to be able to use wifi. So how do I get it working? I tried finding the package, but they just fail installation/don't work/require a few dozens of other packages. I only got a couple of Linux (out of over 10) booting up on it in the first place, and I did manage to get wifi working on Lubuntu awhile back when I had access to ethernet cable - took maybe 10 minutes to install all the packages (well, wait for them to be installed), but it worked after that.
The Wifi adapter is Broadcom Limited BCM4311 802.11b/g WLAN (rev 01).