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#1 2008-12-04 05:27:39

wirenik
Member
Registered: 2008-08-22
Posts: 134

[SOLVED] Disabling N mode: possible? (iwl4965)

Hey guys, I have an Intel 4965 802.11abgn wireless card.
I have been getting download speeds significantly lower than what I expect and what I get with Windows Vista on the same machine.
For example, with the easylist.com Arch mirror I usually get about around 1mbps on other computers. With this one, I get between 60-200kbps.
This happened in Vista as well, but I fixed the problem by disabling N mode in a device manager. I guess our router doesn't support it. So, my question is this: is there a way for me to disable N mode under Linux? It'd be great to get my regular download speeds back. Thanks!

Last edited by wirenik (2008-12-05 01:39:17)


moljac024: No one really knows what happens inside /dev/null... it could be a gateway to another universe....
dunc: If it is, the people who live there must be getting pretty annoyed by now with all the junk we send them.

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#2 2008-12-04 05:53:55

sand_man
Member
From: Australia
Registered: 2008-06-10
Posts: 2,164

Re: [SOLVED] Disabling N mode: possible? (iwl4965)

I thought that you can only disable it from the router's end and the wlan card would just use whats best.
I may be wrong though.


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#3 2008-12-04 07:09:25

tomk
Forum Fellow
From: Ireland
Registered: 2004-07-21
Posts: 9,839

Re: [SOLVED] Disabling N mode: possible? (iwl4965)

Check the modinfo for your driver - there may be a module option you can use. man modinfo and man modprobe for more info.

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#4 2008-12-04 07:19:13

wirenik
Member
Registered: 2008-08-22
Posts: 134

Re: [SOLVED] Disabling N mode: possible? (iwl4965)

Thanks, tomk. I found this:

parm:           11n_disable:disable 11n functionality (int)

...but I'm not sure what I'm supposed to to do with it. Is it an argument I need to somehow pass to modprobe, or something?


moljac024: No one really knows what happens inside /dev/null... it could be a gateway to another universe....
dunc: If it is, the people who live there must be getting pretty annoyed by now with all the junk we send them.

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#5 2008-12-04 08:09:57

lucke
Member
From: Poland
Registered: 2004-11-30
Posts: 4,018

Re: [SOLVED] Disabling N mode: possible? (iwl4965)

Try loading the module with "modprobe module_name that_option=1" (rmmod it first). If it works, add "options module_name that_option=1" to /etc/modprobe.conf to make it permament.

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#6 2008-12-05 01:38:47

wirenik
Member
Registered: 2008-08-22
Posts: 134

Re: [SOLVED] Disabling N mode: possible? (iwl4965)

lucke wrote:

Try loading the module with "modprobe module_name that_option=1" (rmmod it first). If it works, add "options module_name that_option=1" to /etc/modprobe.conf to make it permament.

I did it!

$ modprobe -r iwlagn
$ modprobe iwlagn 11n_disable=1

Now I get up to nearly 2mbps from easynews, and download speeds everywhere else are soaring too. Thanks a million for the help, everyone!


moljac024: No one really knows what happens inside /dev/null... it could be a gateway to another universe....
dunc: If it is, the people who live there must be getting pretty annoyed by now with all the junk we send them.

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#7 2008-12-08 21:01:05

YankeeFan
Member
Registered: 2008-11-14
Posts: 19

Re: [SOLVED] Disabling N mode: possible? (iwl4965)

I would actually like to know how to TURN ON the 11n feature using iwlagn (intel 5100 card).  It only connects as an 11g to my 11n router.

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