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I have a laptop with wifi not working: I can detect hardware with lshw and lspci, but that is it. network-manager is not showing it.

lshw -numeric -C network reports

*-network UNCLAMED
description: Network contriller
product: Intel corporation [8086:8B4]
vendor: Intel corporation [8086]
physical id:0
bus info: pci@0000:02:00.0
version: 93
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: latency=0
resources: memory: c1000000-c1001fff

From here http://linux-wless.passys.nl/query_chipset.php?chipset=Intel I see that it needs driver iwlwifi. I have installed firmware-iwlwifi.

lspci shows

…
00:16.0 Communication controller: Intel Corporation Device 9cb1
…
02:00.0 Network controller: Intel Corporation Device 08b4 (rev 93)

(apology for the truncation, it is on another device, with no network)

If I do rfkill list all I get

0: hci0: Bluetooth
    SoftBlocked: no
    HardBlocked: no
1: ideapad_wlan: Wireless LAN
    SoftBlocked: no
    HardBlocked: no
3: ideapad_bluetooth: Bluetooth
    SoftBlocked: no
    HardBlocked: no

If I press the airplane button then id 1 goes to SoftBlocked: yes, then back to no, on next press.


Output of uname -srmo

Linux 3.2.0-4-amd64 x86_64 GNU/Linux

Distro: Debian wheezy (7)

  • What do you mean "doesn't work"? What do lspci and ip addr show? Could you add an IP address to the wireless interface and ping it? – user86969 Apr 18 '15 at 19:58
  • IP address is at osi-layer 3, I dream of layer 3. This is I think layer 1 hardware. We can see the hardware exists, but not get it to work. – ctrl-alt-delor Apr 18 '15 at 20:13
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    Well, I'm not sure I understand your response but to know if the hardware works or not, I suppose you've checked the logs and saw there is no association with the nearest access point, right? Hard to guess without a log trace. From your lspci output I can see it doesn't have the device friendly name in its database, which means, either you haven't updated it for a long time or the hardware is too recent. Check iwlfiwi support for your wireless adapter could just be not yet supported. – user86969 Apr 18 '15 at 20:26
  • @Nasha I followed your supprt link to intels site, and found the driver (7260 ac), it says there I need a newer kernel, at least 3.10, so I found that there is a 3.16 in wheezy-backports. I installed it, and rebooted, it now works. No need to manually download firmware as well. – ctrl-alt-delor Apr 18 '15 at 21:56
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I fixed it by upgrading the kernel to 3.16, it is in wheezy-backports, it is also in jessie, expected to be released on 25 Apr 2015 (latter this month).

Thanks to @Nasha 's comment, I followed your support link to intel's site, and found the driver (7260 ac), it says there, that I need a newer kernel, at least 3.10, so I found that there is a 3.16 in wheezy-backports. I installed it, and rebooted, it now works. No need to manually download firmware as well.

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