Intel Wireless N 1000 paradox bitrate problem

asked 2012-11-11 05:26:56 -0500

Niclas gravatar image

I've got a Thinkpad T520 running Fedora 17.

My wireless card is the "Wireless N 1000" which is supported by the iwlwifi driver.

My signal strength is very good, but the the bit rate is always low. I can connect to wifi networks if I'm not more than about 2 metres away from the access point. Signal strength is as expected, but bit rate stays at 1 Mb/s. If I'm more than 2 metres away from the access point the connection drops and I just can't connect again although the link quality is at ~ 60/70 (output from iwlconfig).

I already searched a lot on the web and basically there is or was another problem with the iwlwifi driver that caused bad connectivity with 802.11n networks and the option 11n_disable=1 should fix that. I already tried

sudo modprobe iwlwifi 11n_disable=1

and

sudo modprobe iwlwifi wd_disable=1 11n_disable=1

but this did not help. My problem is not related just to 802.11n networks, but to all wifi networks. I also tried an experimental firmware for the wifi card from intel which did not help either. I also tried a lot of different access points at different locations and I always get the same results.

I think this issue at the CentOS bugtracker covers the same issue, but there is no solution yet.

I'm open to all help and suggestions, as I'm currently using an ExpressCard wifi adapter.

Please let my know if you need more system logs or information. I uploaded some useful system info in this gist.

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