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

ZHaa
Beginner
1,666 Views

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?

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4 Replies
ASouz7
Honored Contributor II
325 Views

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
Beginner
325 Views

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
Honored Contributor II
325 Views

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
Beginner
325 Views

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

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