Ubuntu 14.04 and Intel Wireless 7260 problem

I bought Acer V7 – 482PG and installed Ubunntu 14.04. Everything looked good until I found some problems with my WiFi adapter.

My network sometimes unexpectedly disconnected and sometimes I couldn’t connect to WiFi network.

There is workaround which works on my computer.

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Find your adapter version

1. Open terminal
2. Run command

   lspci

3. You can see output like this

   00:00.0 Host bridge: Intel Corporation Haswell-ULT DRAM Controller (rev 09)
   00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 09)
   00:03.0 Audio device: Intel Corporation Haswell-ULT HD Audio Controller (rev 09)
   00:14.0 USB controller: Intel Corporation Lynx Point-LP USB xHCI HC (rev 04)
   00:16.0 Communication controller: Intel Corporation Lynx Point-LP HECI #0 (rev 04)
   00:1b.0 Audio device: Intel Corporation Lynx Point-LP HD Audio Controller (rev 04)
   00:1c.0 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 1 (rev e4)
   00:1c.2 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 3 (rev e4)
   00:1c.3 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 4 (rev e4)
   00:1c.4 PCI bridge: Intel Corporation Lynx Point-LP PCI Express Root Port 5 (rev e4)
   00:1d.0 USB controller: Intel Corporation Lynx Point-LP USB EHCI #1 (rev 04)
   00:1f.0 ISA bridge: Intel Corporation Lynx Point-LP LPC Controller (rev 04)
   00:1f.2 SATA controller: Intel Corporation Lynx Point-LP SATA Controller 1 [AHCI mode] (rev 04)
   00:1f.3 SMBus: Intel Corporation Lynx Point-LP SMBus Controller (rev 04)
   01:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 750M] (rev ff)
   04:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)
   05:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5287 (rev 01)
   05:00.1 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 14)

4. Find line which contains „Network controller: Intel Corporation Wireless“, at the end of line you can find device model (in my case 7260)

Go to the Intel web and download latest firmware

1. Open browser and go to the URL: http://www.intel.com/support/wireless/wlan/sb/CS-034398.htm
2. Find your wireless adapter in table.
   (in my case: iwlwifi-3160-ucode-22.15.8.0.tgz)
3. Download firmware (tgz) file

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Firmware installation

1. Open terminal
2. Check which version is installed in your system

    ls /lib/firmware/iwlwifi-7260*

   e.g if you see this output, you have installed version „7“

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

3. Backup old firmware to your home folder

   sudo mv /lib/firmware/iwlwifi-7260-8.ucode ~/

4. Go to the folder where is new downloaded firmware

   cd ~/Downloads

5. Unzip downloaded firmware

   tar xvzf iwlwifi-7260-ucode-22.15.8.0.tgz

6. Copy new firmware version to /lib/firmware

    sudo cp ~/Downloads/iwlwifi-7260-ucode-22.15.8.0/iwlwifi-7260-8.ucode /lib/firmware

7. Set correct file owner

   sudo chown root:root /lib/firmware/iwlwifi-7260-8.ucode

8. Check if everything was successfully done by command

   ls -l /lib/firmware/iwlwifi-7260-8.ucode

   You should see similar output

   -rw-r--r-- 1 root root 674628 kvě 29 13:38 /lib/firmware/iwlwifi-7260-8.ucode

9. Restart computer

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