I just installed Ubuntu 16.04 on a laptop with Intel Wireless 7260, but the kernel does not recognize wifi. The laptop does not have ethernet, and wifi is my only way to connect to the internet.
As I searched, many people have this problem.
One issue that I see is that the intel driver for kernel 4.3+ should be
iwlwifi-7260-17.ucode, but Ubuntu uses
iwlwifi-7260-16.ucode is available. I downloaded
iwlwifi-7260-17.ucode from Intel website, but still no success.