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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*

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.

share|improve this question
Please confirm that you made the changes to iwl-7000.c, compiled backports-3.10.2 and loaded iwlwifi. What interesting clues are in: dmesg | grep iwl? –  chili555 Aug 12 '13 at 13:30
I believe it's the loading of the iwlwifi which failed as I see iwlwifi-7260-6.ucode is loaded. I had a version iwlwifi-7260-7.ucode already, and replacing it didn't help. Not sure why it doesn't load this anyway. –  Peter Lawrey Aug 12 '13 at 13:34
The change to iwl-7000.c is supposed to fix that. You might also rename -6.ucode to -6.bak so it can't load and see if it helps. You will need to unload and reload iwlwifi or reboot for the change to be effective. –  chili555 Aug 12 '13 at 13:42
@chili555 That is what confuses me. No such file exists. Only the -7.ucode exists. –  Peter Lawrey Aug 12 '13 at 13:44
What is the exact message in dmesg that says -6 is loading. Maybe we can deduce what to fix in iwl-7000.c. dmesg | grep -e firm -e ucode –  chili555 Aug 12 '13 at 13:46
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1 Answer

up vote 16 down vote accepted

I suggest you download this to your desktop: http://www.kernel.org/pub/linux/kernel/projects/backports/stable/v3.11-rc3/backports-3.11-rc3-1.tar.bz2 Right-click it and select 'Extract Here.' Now open a terminal and do:

cd Desktop/backports-3.11-rc3-1/
make defconfig-iwlwifi
sudo make install

Now download the required firmware here: https://git.kernel.org/cgit/linux/kernel/git/egrumbach/linux-firmware.git/plain/iwlwifi-7260-7.ucode Now open a terminal and do:

sudo cp ~/Desktop/iwlwifi-7260-7.ucode /lib/firmware/  <--or wherever you downloaded it
sudo modprobe -r iwldvm  <--If it is not loaded, OK, please proceed
sudo modprobe -r iwlwifi <--If it is not loaded, OK, please proceed
sudo modprobe iwlwifi

Your wireless should now be working.

share|improve this answer
+1 This worked for me. –  Peter Lawrey Aug 14 '13 at 6:25
For those who ask, the ucode file comes from the Debian package: packages.debian.org/fr/sid/firmware-iwlwifi –  rcomblen Sep 4 '13 at 10:09
Thanks, that helped! Does this mean though that now I can't update the kernel packages via system update? –  Dmitry Pashkevich Oct 15 '13 at 14:06
@DmitryPashkevich- Yes, you can, but you will have to repeat the compile process above. The firmware part need not be repeated. –  chili555 Oct 15 '13 at 14:25
yeah that's what I actually meant :) thanks. I can update the kernel but I would have to reinstall the backport again –  Dmitry Pashkevich Oct 15 '13 at 15:14
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protected by Community Oct 2 '13 at 13:02

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