Wifi speed on linux significantly slower than on Windows. Why? (Centrino-6205N)

[ZHaa]

Hi,

I have a Dell Latitude E6520 notebook with a Centrino-6205N wireless adapter.

When I use it with windows 7, the speed of wireless network is greater than if I use it with linux (I've tried the latest version of Ubuntu, CentOS, Fedora and GRML)

For example: download speed in windows, nearly 30Mbps, the same download in linux is about 16-18Mbps.

I've set parameters 11n_disable=8 and bt_coex_active=0.

Any idea, how can I speed up my linux?

[ASouz7]

Hello H.Z,

The Intel® Drivers for Linux*can be obtained through the this link: http://www.intel.com/support/wireless/wlan/sb/CS-034398.htm Intel® Wi-Fi Products — Linux* Support for Intel® Wi-Fi Adapters

[ZHaa]

Thank you, but... As far as I know, all of the tested linux systems are using the latest driver. (Ubuntu and Fedora surely, I've checked)

I have to ideas, why linuxes are slower than win7:

- perhaps, the linux driver runs with enabled debugging features (I've see this somewhere in the logs, but don't remember exactly where...)

- there is no problem with wireless driver, but the IPv4 stack needs optimization.

I've been searching for a solution or explanation for this problem, but I found nothing. The most what I found was to set module iwlwifi's option 11n_disable to 8 and switch off power management (this is disabled by default)

[ASouz7]

H.Z,

We do understand your concern but any optimization should be done by the Linux* Team. Here are their contacts:

mailto:mailto:linux-wireless@vger.kernel.org wireless@vger.kernel.org

mailto:mailto:ilw@linux.intel.com ilw@linux.intel.com

They can also be found here: https://wireless.wiki.kernel.org/en/users/Drivers/iwlwifi https://wireless.wiki.kernel.org/en/users/Drivers/iwlwifi just scroll down to where it says support.

[ZHaa]

I'm sorry... I've asked here, because I thought, "community" = "group of (advanced) users", not official support.