No wlan0 after kernel 4.9.0 installation on Debian Jessie.

jacnj · 12-11-2016, 08:52 PM

Hello all,

I was having graphics card issues with the stock installation of Debian Jessie 8. I upgraded the kernel, which fixed the graphics issue but broke my wifi. I made sure the non-free firmware is installed with:

Note: Kernel source: https://www.kernel.org/

Code:

apt-get install firmware-iwlwifi

The os can see the wifi card:

Code:

xxxxx@xxxxxxx:~# lspci -nn | grep 0280
03:00.0 Network controller [0280]: Intel Corporation Wireless 7260 [8086:08b2] (rev 83)

The results of

Code:

ifconfig

:

Code:

xxxxx@xxxxxxx:~$ sudo ifconfig
eth0      Link encap:Ethernet  HWaddr 28:d2:44:39:b5:d2  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:70 errors:0 dropped:0 overruns:0 frame:0
          TX packets:111 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:13215 (12.9 KiB)  TX bytes:15706 (15.3 KiB)
          Interrupt:20 Memory:f0600000-f0620000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:43 errors:0 dropped:0 overruns:0 frame:0
          TX packets:43 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:4323 (4.2 KiB)  TX bytes:4323 (4.2 KiB)

The required firmware is in /lib/firmware:

Code:

-rw-r--r--  1 root root  337520 Jun 15  2014 iwlwifi-1000-5.ucode
-rw-r--r--  1 root root  337572 Jun 15  2014 iwlwifi-100-5.ucode
-rw-r--r--  1 root root  689680 Jun 15  2014 iwlwifi-105-6.ucode
-rw-r--r--  1 root root  701228 Jun 15  2014 iwlwifi-135-6.ucode
-rw-r--r--  1 root root  695876 Jun 15  2014 iwlwifi-2000-6.ucode
-rw-r--r--  1 root root  707392 Jun 15  2014 iwlwifi-2030-6.ucode
-rw-r--r--  1 root root  670484 Jun 15  2014 iwlwifi-3160-7.ucode
-rw-r--r--  1 root root  667284 Jun 15  2014 iwlwifi-3160-8.ucode
-rw-r--r--  1 root root  666792 Jun 15  2014 iwlwifi-3160-9.ucode
-rw-r--r--  1 root root  150100 Jun 15  2014 iwlwifi-3945-2.ucode
-rw-r--r--  1 root root  187972 Jun 15  2014 iwlwifi-4965-2.ucode
-rw-r--r--  1 root root  353240 Jun 15  2014 iwlwifi-5000-2.ucode
-rw-r--r--  1 root root  340696 Jun 15  2014 iwlwifi-5000-5.ucode
-rw-r--r--  1 root root  337400 Jun 15  2014 iwlwifi-5150-2.ucode
-rw-r--r--  1 root root  454608 Jun 15  2014 iwlwifi-6000-4.ucode
-rw-r--r--  1 root root  444128 Jun 15  2014 iwlwifi-6000g2a-5.ucode
-rw-r--r--  1 root root  677296 Jun 15  2014 iwlwifi-6000g2a-6.ucode
-rw-r--r--  1 root root  679436 Jun 15  2014 iwlwifi-6000g2b-6.ucode
-rw-r--r--  1 root root  463692 Jun 15  2014 iwlwifi-6050-4.ucode
-rw-r--r--  1 root root  469780 Jun 15  2014 iwlwifi-6050-5.ucode
-rw-r--r--  1 root root  683236 Jun 15  2014 iwlwifi-7260-7.ucode
-rw-r--r--  1 root root  679780 Jun 15  2014 iwlwifi-7260-8.ucode
-rw-r--r--  1 root root  679380 Jun 15  2014 iwlwifi-7260-9.ucode
-rw-r--r--  1 root root  690452 Jun 15  2014 iwlwifi-7265-8.ucode
-rw-r--r--  1 root root  691960 Jun 15  2014 iwlwifi-7265-9.ucode

I've tried this solution to no avail: http://www.linuxquestions.org/questi...-wlan0-333831/

My question: What happened to my wlan0 adapter after the kernel update?

c0wb0y · 12-11-2016, 10:36 PM

Any wlan0-related messages at dmesg? Try this:

Code:

ip link

if nothing comes up

Code:

ip link set dev wlan0 up

jacnj · 12-11-2016, 11:07 PM

Quote:

Originally Posted by c0wb0y

Any wlan0-related messages at dmesg? Try this:

Code:

ip link

if nothing comes up

Code:

ip link set dev wlan0 up

here are the results:

Code:

xxxxx@xxxxxx:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000
    link/ether 28:d2:44:39:b5:d2 brd ff:ff:ff:ff:ff:ff
xxxxx@xxxxxxx:~$ ip link set dev wlan0 up
Cannot find device "wlan0"

c0wb0y · 12-11-2016, 11:31 PM

Ok, so it doesn't show there. Try this:

Code:

ls -la /sys/class/net/

jacnj · 12-11-2016, 11:34 PM

Doesn't seem to be there either

Code:

xxxxx@xxxxxx:~$ ls -la /sys/class/net/
total 0
drwxr-xr-x  2 root root 0 Dec 11 22:33 .
drwxr-xr-x 55 root root 0 Dec 11 20:35 ..
lrwxrwxrwx  1 root root 0 Dec 11 20:35 eth0 -> ../../devices/pci0000:00/0000:00:19.0/net/eth0
lrwxrwxrwx  1 root root 0 Dec 11 20:35 lo -> ../../devices/virtual/net/lo

c0wb0y · 12-11-2016, 11:49 PM

It seems module is not loaded, that's why we're not seeing any wlan0. Can you:

Code:

find /lib/modules/$(uname -r) -type f -name 'iwl*'

Now if you see iwlwifi.ko, load the module:

Code:

modprobe iwlwifi

Note: no trailing .ko.

jacnj · 12-12-2016, 08:44 AM

Sorry for the delayed response, my power went out.

Code:

xxxxx@xxxxxx:~$ find /lib/modules/$(uname -r) -type f -name 'iwl*'
/lib/modules/4.9.0-custom/kernel/drivers/net/wireless/intel/iwlegacy/iwl3945.ko
/lib/modules/4.9.0-custom/kernel/drivers/net/wireless/intel/iwlegacy/iwl4965.ko
/lib/modules/4.9.0-custom/kernel/drivers/net/wireless/intel/iwlegacy/iwlegacy.ko
/lib/modules/4.9.0-custom/kernel/drivers/net/wireless/intel/iwlwifi/mvm/iwlmvm.ko
/lib/modules/4.9.0-custom/kernel/drivers/net/wireless/intel/iwlwifi/dvm/iwldvm.ko
/lib/modules/4.9.0-custom/kernel/drivers/net/wireless/intel/iwlwifi/iwlwifi.ko
xxxxx@xxxxxxx:~$ modprobe iwlwifi
bash: modprobe: command not found
xxxxx@xxxxxx:~$ sudo modprobe iwlwifi
[sudo] password for xxxxx: 
xxxxx@xxxxxxx:~$

I see the driver, but modprobe iwlwifi doesn't seem to do anything.

After modprobe iwlwifi and restart:

Code:

xxxxx@xxxxxxx:~$ sudo ifconfig
[sudo] password for xxxxx: 
eth0      Link encap:Ethernet  HWaddr 28:d2:44:39:b5:d2  
          inet addr:192.168.0.15  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: 2600:8800:8080:ae0:2ad2:44ff:fe39:b5d2/64 Scope:Global
          inet6 addr: fe80::2ad2:44ff:fe39:b5d2/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:69 errors:0 dropped:0 overruns:0 frame:0
          TX packets:113 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:13061 (12.7 KiB)  TX bytes:15749 (15.3 KiB)
          Interrupt:20 Memory:f0600000-f0620000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:31 errors:0 dropped:0 overruns:0 frame:0
          TX packets:31 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1 
          RX bytes:3315 (3.2 KiB)  TX bytes:3315 (3.2 KiB)

jacnj · 12-12-2016, 09:32 AM

I've decided to just switch back to the original kernel. I need this machine in working order, fast. I'll address the graphics issue from there later as it doesn't hinder actual use of the machine.

Thanks for the help!

c0wb0y · 12-12-2016, 12:16 PM

It's a custom kernel by the looks which I should have asked you first.

My guess is you don't have the MSI on your custom kernel. grep that from the .config

jacnj · 12-12-2016, 01:18 PM

I've already switched back. I'll give it a try though.

BourneSupremacy · 12-24-2016, 08:09 AM

Quote:

Originally Posted by jacnj

I've already switched back. I'll give it a try though.

understand you already switched back but did you try the rfkill command?? If not you may want to.....

jacnj · 12-24-2016, 03:04 PM

Quote:

Originally Posted by BourneSupremacy

understand you already switched back but did you try the rfkill command?? If not you may want to.....

Can you explain how this will help? Thanks for the reply BTW.

Brains · 12-24-2016, 07:53 PM

Quote:

Originally Posted by jacnj

After modprobe iwlwifi and restart:

After restart, one would have to modprobe again

BourneSupremacy · 12-25-2016, 07:05 AM

Quote:

Originally Posted by jacnj

Can you explain how this will help? Thanks for the reply BTW.

If wireless fails to work even after installing firmware, do the following:

root@masterdebian: cd /etc/NetworkManager
root@masterdebian: cat NetworkManager.conf

[main]
plugins=ifupdown,keyfile

[ifupdown]
managed=false

Change the last line in [ifupdown] from managed=false to managed=true; then run the following commands:

modprobe -r {firmware version installed} - in my case it was modprobe -r ipw2200, the -r is for reset
modprobe ipw2200 - will turn the wireless card on

For devices with a BCM4306 revision 3, BCM4311, BCM4318, BCM4321 or BCM4322 chip, install:
apt-get install firmware-b43-installer

For devices with a BCM4301 chip or the BCM4306 revision 2 chip, install:
apt-get install firmware-b43legacy-installer

Also don't forget to check via the rfkill list command to see if the actual hardware/software switches are turned off or on

root@masterdebian:/etc/NetworkManager# rfkill list
1: hp-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
7: phy7: Wireless LAN
Soft blocked: no
Hard blocked: no

The below are the options available for the rfill command:

root@masterdebian:/etc/NetworkManager# rfkill --help
Usage: rfkill [options] command
Options:
--version show version (0.5-1 (Debian))
Commands:
help
event
list [IDENTIFIER]
block IDENTIFIER
unblock IDENTIFIER
where IDENTIFIER is the index no. of an rfkill switch or one of:
<idx> all wifi wlan bluetooth uwb ultrawideband wimax wwan gps fm nfc