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Thread: slow wifi/internet speed

  1. #1
    Join Date
    Oct 2011

    slow wifi/internet speed


    I am an inexperienced Ubuntu user.

    I am observing different internet connection speeds on Ubuntu and Windows.

    I searched the forums, found and read this thread:

    As per suggested by "varunendra":
    I downloaded and ran the script.

    Here's the pastebin link to the generated file:

    The internet connection works fine on Windows and my Android device but not on Ubuntu.

  2. #2
    Join Date
    Mar 2010
    Ubuntu 12.04 Precise Pangolin

    Re: slow wifi/internet speed

    How are you observing the speed, and what is your basis for determining the average traffic (upload/download) speed?
    What are the 'practical' speeds in Windows and Ubuntu as per your observations?

    If you are sure you are getting significantly slower speeds in Ubuntu, try the following-

    Some driver parameters (temporarily) -
    sudo modprobe -rv iwldvm
    sudo modprobe -v iwlwifi swcrypto=1 bt_coex_active=N
    sudo modprobe -v iwldvm
    This will be a temporary change that will be lost at next boot. If this helps improving the speed, we can make it permanent.

    If the above doesn't help, try another parameter -
    sudo modprobe -rv iwldvm
    sudo modprobe -v iwlwifi 11n_disable=1
    sudo modprobe -v iwldvm
    This will disable N-channel support on the driver, means you won't get speed higher than 54Mbps (=6 MB(yte)ps approx.). If your current average speed is already better than this, don't try this parameter. If it is worse, it may help.

    There are several UFW block messages every few seconds. I suggest you also try temporary disabling it with -
    sudo ufw disable
    ..and see if there is any significant improvement in the speed.
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