Ubuntu – Ubuntu 14.04 Intel 7260 AC Wireless driver does not work properly


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

       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= ip= 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?

Best Answer

After making partial upgrade with Software Updater the problems have been gone away. So this issue is fixed for me.

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