I have a Dell Vostro 1520, and I just installed Kubuntu 18.04. I know this is a known issue, but I have no WiFi or Ethernet connection. I have the BCM 4312 Broadcom Adapter. Because I don't have a wired connection, I'm not able to download or install the correct adapter.
lpsci -nn -d 14e4:
Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
Results of 'wireless-info':
https://pastebin.ubuntu.com/p/cwVcgkJhW5/
lpsci -nn -d 14e4:
Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
Results of 'wireless-info':
https://pastebin.ubuntu.com/p/cwVcgkJhW5/