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Retired Moderator
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Symptoms

A T510 system when running Linux gives  slow bandwidth speed when connected to a Wifi Router 

Diagnosis

T510 systems running Linux 

Solution

The problem seems to be that the iwlagn-driver doesnt work right for every supported chip in N-Mode. So the N-Mode is deactivated by default.

 

To activate again:

              rmmod iwlagn
              modprobe iwlagn 11n_disable=0

 

or

 

just change this line as permanent setting in /etc/modprobe.d/intel-5300-iwlagn-disable11n.conf

 

             options iwlagn 11n_disable=0

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