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cessman4life
Tux's lil' helper
Joined: 14 Apr 2005
Posts: 141
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 Posted: Thu Jan 05, 2012 4:59 pm Post subject: Disabling Wireless-N |
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I was having problems connecting wirelessly with my laptop where there was either no connection or it was just ridiculously slow. By disabling wireless-N and leaving modes B/G enabled I have it working like a champ. The problem is I have to disable wireless-N everytime the machine reboots. Is there a startup script I can run to have it disabled on boot? I found out how to disable the driver from another post https://forums.gentoo.org/viewtopic-t-881681-start-0.html:
| Code: |
rmmod iwlagn
modprobe iwlagn 11n_disable=1
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Logicien
Veteran
Joined: 16 Sep 2005
Posts: 1555
Location: Montréal
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| Posted: Thu Jan 05, 2012 5:54 pm Post subject: |
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Hello,
you can, as example, create /etc/modprobe.d/iwlagn.conf and write in
| Code: | | options iwlagn 11n_disable=1 |
Then the option should be activated any time the module iwlagn is loaded. You can verify if the parameter is at 1 by
| Code: | | cat /sys/module/iwlagn/parameters/11n_disable |
Note, if the iwlagn is compiled hard in the kernel, you need to pass at boot time to the kernel the parameter
| Code: | | iwlagn.11n_disable=1 |
If it is compiled as a module and you use an initrd, it can be needed to integrate the /etc/modprobe.d/iwlagn.conf file in the initrd if the module is loaded before the real root filesystem is accessed by the kernel.
Personnaly, I put all my modules parameters in /etc/modprobe.d/modprobe.conf who do not exist by default after Gentoo installation. I check if every module option I change from default already exist and his value with the command
It is important that the same option with a different value do not overwrite my change. If it is, the files in /etc/modprobe.d/ need to be edited to remove the opposite option from the one I add. I have been force to use this option with one AGN wireless AP (Access Point). The bandwidth speed increased a lot after that. Most of the time for me, this option do not change anything else than disable 11n functionality.
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Paul |
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cessman4life
Tux's lil' helper
Joined: 14 Apr 2005
Posts: 141
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| Posted: Thu Jan 12, 2012 6:26 am Post subject: |
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I tried that and
| Code: | | cat /sys/module/iwlagn/parameters/11n_disable |
returns
instead of 1
When I reboot the wireless does not connect so I assume N is still enabled. |
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cach0rr0
Bodhisattva
Joined: 13 Nov 2008
Posts: 4123
Location: Houston, Republic of Texas
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| Posted: Thu Jan 12, 2012 6:54 am Post subject: |
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you might have to do the module parameter bit in /etc/conf.d/modules in order for it to persist on reboot
not sure if that (old?) path still works now that everything is baselayout-2/openrc
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