Wi-Fi connection problem on Ubuntu 14.04


I have installed Ubuntu 14.04 (Thusty Tahr) and Wi-Fi scans the networks and connects correctly, but Mozilla Firefox or Google Chrome can’t open websites. It works with cable connection trouble-free.

I looked for a solution long time on the Internet. Then I found that there is a bug in Ubuntu Network Manager. Because of this bug Ubuntu Network Manager takes Bit Rate=1 Mb/s for wlan0.


iwconfig wlan0 rate 54M

Make this automatically for every system start:

sudo gedit /etc/rc.local
# add the following line before exit 0 line, save and exit
iwconfig wlan0 rate 54M

Reference: askubuntu.com


  1. sri
    Nov 06, 2014 @ 15:38:51


    I am getting this error
    “Error for wireless request “Set Bit Rate” (8B20) :
    SET failed on device wlan0 ; Operation not permitted.”
    even if i use sudo also same error please help me.


    • Cem Ikta
      Nov 10, 2014 @ 14:38:50


      Maybe you have Wi-Fi driver problems? I don’t know, but askubuntu.com community have excellent support for Wi-Fi problems. Look at questions and solutions or ask your question.


  2. anonymous
    Nov 11, 2014 @ 11:43:05

    You need to use “sudo“ for admin permissions:
    sudo iwconfig wlan0 rate 54M


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