I have dell xps 13 developer edition with ubuntu 14.04. Actually when I bought the machine it came with ubuntu 12.04. Before upgrade to 14.04 the wireless driver was running perfectly. After upgrading to 14.04 the driver gets in broken mode. I can connect to saved networks but if I plan to connect to an unsaved network it does not work. When the qui gets in trouble I give a try to terminal by typing:
$ iwlist scan
The response is:
lo Interface doesn't support scanning. virbr0 Interface doesn't support scanning. lxcbr0 Interface doesn't support scanning. wlan0 Interface doesn't support scanning.
My driver info:
$ sudo lshw -C network *-network description: Ethernet interface product: Wireless 7260 vendor: Intel Corporation physical id: 0 bus info: pci@0000:02:00.0 logical name: wlan0 version: 6b serial: 7c:7a:91:8c:df:fc width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list ethernet physical configuration: broadcast=yes driver=iwlwifi driverversion=3.5.0-48-generic firmware=126.96.36.199 ip=192.168.2.237 latency=0 link=yes multicast=yes resources: irq:58 memory:f0400000-f0401fff
I am really in a big trouble. I can connect to any wifi network except saved wifi networks. If I can not find any solution I will downgrade to 12.04 again.
What is the proper way using this driver with 14.04?