I have a brand new Dell XPS 15. I dual boot it with Windows 8.1 and Ubuntu 14.10 The Wireless Network Adapter is
Broadcom BCM4352 802.11ac with
PCID [14e4:43b1] (rev 03).
The 4352 is not included in the list for installation via
bcmwl-kernal-source file. I tried this anyway, but the Terminal command led to the file starting to install, but then stopping. Sometimes I get a permission denied error message.
As a result of reading and trying all advice from forums I have decided to completely reinstall Ubuntu 14.10. I doubt my particular Broadcom Wireless Card has no support on Ubuntu 14.10?
The advice of Chili555 worked. I now have working wifi using Broadcom Wireless Adapter BCM4352 802.11ac PCID [14e4:43b1] (rev 03)