I'm at the end of my wits, I'm new to linux which makes things much more difficult and didn't expect this much to be broken straight out of the box. I have a dell XPS 13 (9343) which works completely fine in windows 10. Though when I dual boot into my 16.04 LTS Gnome Ubuntu partition which is a fresh clean install that I made literally today the wifi will never toggle on after making sure I updated the OS through the program called "software", I made sure I was using the proprietary broadcom drivers for the broadcom BCM4352 802.11ac Wireless Network Adapter, and I made sure secure boot was disabled in the bios and disabled during the install processes as I read others had that issue. And no my airplane mode is not stuck on. My current issue is that my wifi will not turn on, plugging directly into my router lets me get Internet but wifi is still a no go. If anyone has any insight on how to fix this that would be great. If not ill probably un-install this waste of space and deal with terrible windows updates.
Try Reinstalling the wifi driver (check your wifi adapter name in windows, download file to usb, boot into ubuntu and follow the instructions on the linked video to install the driver. -instructions: https://youtu.be/J4O_LwiXwNk Hope that works. - I ticked the box that said install wifi drivers during my Ubuntu installation too, but my wifi didn't work with them either.