mjhjmtu

I can't get my WLAN working on a fresh Debian 8.7.1 64bit installation. Maybe you can help me find the issue. The card I am using is an Intel 8260 WLAN/Bluetooth card:

# lspci | grep Wire
04:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)

I installed iwlwifi with apt and loaded the module:

# modprobe -r iwlwifi ; modprobe iwlwifi

lsmod output:

# lsmod | grep wif
iwlwifi 96547 0
cfg80211 413730 1 iwlwifi

iwconfig:

# iwconfig
lo no wireless extensions.

eth0 no wireless extensions.

So what am I missing?! I am getting the feel it's because of the firmware not supporting the Kernel?

root@dfog:/home/irrgeist# uname -a
Linux debian 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1 (2016-12-30) x86_64 GNU/Linux

I rebooted the system.

Edit:

#ls /lib/firmware/
av7110 iwlwifi-3160-8.ucode iwlwifi-7260-8.ucode
carl9170-1.fw iwlwifi-3160-9.ucode iwlwifi-7260-9.ucode
cis iwlwifi-3945-2.ucode iwlwifi-7265-8.ucode
dsp56k iwlwifi-4965-2.ucode iwlwifi-7265-9.ucode
hp iwlwifi-5000-2.ucode iwlwifi-8000C-13.ucode
intel iwlwifi-5000-5.ucode iwlwifi-8265-22.ucode
isci iwlwifi-5150-2.ucode keyspan_pda
iwlwifi-1000-5.ucode iwlwifi-6000-4.ucode RTL8192E
iwlwifi-100-5.ucode iwlwifi-6000g2a-5.ucode RTL8192SU
iwlwifi-105-6.ucode iwlwifi-6000g2a-6.ucode rtl_nic
iwlwifi-135-6.ucode iwlwifi-6000g2b-6.ucode rtlwifi
iwlwifi-2000-6.ucode iwlwifi-6050-4.ucode usbduxfast_firmware.bin
iwlwifi-2030-6.ucode iwlwifi-6050-5.ucode usbdux_firmware.bin
iwlwifi-3160-7.ucode iwlwifi-7260-7.ucode usbduxsigma_firmware.bin

sources.list

#

# deb cdrom:[Debian GNU/Linux 8.7.1 _Jessie_ - Official amd64 NETINST Binary-1 20170116-10:57]/ jessie main

#deb cdrom:[Debian GNU/Linux 8.7.1 _Jessie_ - Official amd64 NETINST Binary-1 20170116-10:57]/ jessie main

deb http://ftp.de.debian.org/debian/ jessie main non-free contrib
deb-src http://ftp.de.debian.org/debian/ jessie main non-free contrib

deb http://security.debian.org/ jessie/updates main contrib non-free
deb-src http://security.debian.org/ jessie/updates main contrib non-free

# jessie-updates, previously known as 'volatile'
deb http://ftp.de.debian.org/debian/ jessie-updates main contrib non-free
deb-src http://ftp.de.debian.org/debian/ jessie-updates main contrib non-free

deb http://ftp.de.debian.org/debian/ jessie-backports main contrib non-free

According to the official website the Intel® Dual Band Wireless-AC 8260 work on kernel version 4.1 and higher.

You can add the backports repo to your sources.list

deb http://ftp.debian.org/debian jessie-backports main non-free

Update and run apt-cache search linux-image to get the available linux-image then install a kernel > 4.1

e,g :

apt-get install linux-image-4.8.0-0.bpo.2-amd64

or the latest kernel version:

apt-get install linux-image-4.9.0-0.bpo.1-amd64-unsigned

Reboot your system and install the firmware-iwlwifi needed to get the Bluetooth working :

apt-get install -t jessie-backports firmware-iwlwifi

The wifi firmware iwlwifi-8000C-16.ucode is included on the firmware-iwlwifi package , also it can be added through :

wget https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-8000-ucode-16.242414.0.tgz
tar xvf iwlwifi-8000-ucode-16.242414.0.tgz
cd iwlwifi-8000-ucode-16.242414.0
cp iwlwifi* /lib/firmware

EDIT

To solve the black screen after installing the new kernel reinstall xserver-xorg-video-intel from backports , to get more info about the problem , see the answer of Stephen Kitt.

apt-get remove xserver-xorg-video-intel 
apt-get install -t jessie-backports xserver-xorg-video-intel

according to intel-supports-site

you need higher kernel-version (4.1). Try kernel from backports.

I went to the synaptic package manager and typed in iwlwifi, then hit search.
this gave me the option of firmware-iwlwifi, which I selected and installed.
then I rebooted
wifi now seen, I am connected right now.

Debian stretch 9, with the intel 8260 WLAN/Bluetooth card
(I am new to Debian this month but have been using Ubuntu, Mint, Manjaro, since 2012).