I just installed Ubuntu 14.04 on my Dell Inspiron 14. It does not list any WiFi network, Ethernet works fine though.
lspci
command gives the following output.
$ lspci -knn | grep Net -A2
01:00.0 Network controller [0280]: Qualcomm Atheros Device [168c:0042] (rev 31)
Subsystem: Dell Device [1028:1810]
02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 07)
How to get the wifi working?