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First I'd like to say that I have searched a lot and tried many things to solve my problem. But nothing seems to work.

I have a Dell laptop Inspiron-5448 with Ubuntu 14.04. It is new and Ubuntu came pre-installed. My wireless card is Intel Corporation Wireless 7265 (rev 59).

When I connect the LAN cable from the router to my laptop, the internet works with 30 Mbps. When I'm using WiFi it goes as low as 2Mbps. Sometimes even less. Other laptops with Windows and even with Ubuntu 14.04 have no problem.

I don't know what to do anymore. I hope there's someone here with enough knowledge to find out what is happening.

Here's the output from wireless-info script: https://paste.ubuntu.com/16642725/

  • Please run the ubuntu forums wireless script (github.com/UbuntuForums/wireless-info) and paste the results into paste.ubuntu.com then edit your answer to include a link to it. – Steve Roome May 23 '16 at 19:56
  • Done. I hope it is going to be helpful. – gmsalomao2 May 23 '16 at 20:32
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So far we have established that you have a Intel Corporation Dual Band Wireless-AC 7265 chip and you are using the iwlwifi driver. The wireless hardware is working at 12Mb/S, but for some reason NetworkManager thinks it is only capable of 1Mb/S.

I have found reports AC 7265 speed problem reports that state that there is a problem with the firmware and that bluetooth and wi-fi both work well as long as they are not switched on at the same time. If you don't need a bluetooth mouse changing to a wired mouse may well be the simplest solution.

Updating to the latest version of the firmware apparently solves this. You can download the latest firmware from Intel's Linux driver support page. Make sure you install the firmware for the correct chip and kernel version. You are currently on 3.19.0

You then need to rebuild your kernel to tell it to load the updated firmware file. Instructions for doing so are here. Loading external firmware tutorial

You could also install the driver from a later kernel version or simply try upgrading to Ubuntu 16.04 LTS although Wi-Fi problems seem quite common on the current release.

  • My current driver firmware version is 25.228.9.0. I've download the latest firmware and copied it to the firmware folder, as the website instructs. But after rebooting the system, the new version is not loaded =( – gmsalomao2 May 24 '16 at 14:22
  • Try a complete rename of the old firmware so it cant possibly be loaded and ensure the new firmware is in the same folder and has the same owner and read write execute permissions. – Steve Roome May 24 '16 at 15:28
  • Didn't work =( Wifi disappeared after renaming the old files and rebooting. – gmsalomao2 May 24 '16 at 19:42
  • I wonder if there's a file where the firmware to be used is determined... – gmsalomao2 May 25 '16 at 2:09
  • @gmsalomao2 I looked into it and its hard-wired into the kernel. I have added a link to a tutorial on how to change this, but I have never built a kernel myself. – Steve Roome May 25 '16 at 19:21

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