The wifi on my Dell XPS 13 stopped working yesterday. It connects, and drops the connection a few seconds later. It was working before, the only thing I can think of that happened was a routine system update.
This is the chipset:
01:00.0 Network controller : Qualcomm Atheros AR9462 Wireless Network Adapter [168c:0034] (rev 01)
Edit: This seems to have been a hardware problem, replacing the wifi-card solved the problem.