I have a Dell XPS 12 running Ubuntu 13.10 and it doesn't appear to find it's wireless. I have tried the suggestions here but they made no difference

peter@xps:/lib/firmware$ ls -l /lib/firmware/iwlwifi-7260-7.ucode 

-rw-r--r-- 1 root root 682892 Aug  4 12:50 /lib/firmware/iwlwifi-7260-7.ucode

peter@xps:/lib/firmware$ sudo lshw -c network

  *-network UNCLAIMED     

       description: Network controller

       product: Wireless 7260

       vendor: Intel Corporation

       physical id: 0

       bus info: pci@0000:06:00.0

       version: 63

       width: 64 bits

       clock: 33MHz

       capabilities: pm msi pciexpress cap_list

       configuration: latency=0

       resources: memory:f7c00000-f7c01fff



peter@xps:~/backports-3.10-2$ grep IWL7260_UCODE_API_MAX drivers/net/wireless/iwlwifi/iwl-7000.c 

#define IWL7260_UCODE_API_MAX   7

    .ucode_api_max = IWL7260_UCODE_API_MAX,         

peter@xps:~/backports-3.10-2$ dmesg | grep iwl

peter@xps:~/backports-3.10-2$ iwconfig

lo        no wireless extensions.



peter@xps:~$ find / -name *7260-6*

peter@xps:~$ find / -name *7260-7*

/lib/firmware/iwlwifi-7260-7.ucode 



peter@xps:~$ dmesg | grep -i -A 20 intel

[ 1318.013278] Intel(R) Wireless WiFi driver for Linux, in-tree:d

[ 1318.013281] Copyright(c) 2003-2013 Intel Corporation

[ 1318.015154] cfg80211: World regulatory domain updated:

[ 1318.015157] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)

[ 1318.015159] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

[ 1318.015161] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

[ 1318.015162] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)

[ 1318.015164] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

[ 1318.015165] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)

What I have found is that it appears to be loading an old version of the firmware but I don't know how or why

peter@xps:/lib/firmware$ modinfo iwlwifi | grep 7260

firmware:       iwlwifi-7260-6.ucode

peter@xps:/lib/firmware$ ls *7260-6*

ls: cannot access *7260-6*: No such file or directory

Any suggestions of how to get this setup very welcome.