RE: [ipw3945-devel] IWL3945 always reports noise levels of -127

Cahill, Ben M
2009-05-04T19:27:43Z

>-----Original Message-----
>From: Maxim Levitsky [mailto:maximlevitsky@gmail.com]
>Sent: Monday, May 04, 2009 3:04 PM
>To: Cahill, Ben M
>Cc: iwlwifi maling list; linux-wireless
>Subject: RE: [ipw3945-devel] IWL3945 always reports noise
>levels of -127
>
>On Mon, 2009-05-04 at 11:53 -0700, Cahill, Ben M wrote:
>> When one of our devices cannot figure out what the actual
>noise level is, it reports -127.
>>
>> Newer devices are better at old devices at figuring noise
>level. IIRC, 3945 cannot figure noise for CCK signals, and
>may not be possible with OFDM as well.
>
>Why then it did work on older kernel ?
>(and noise levels seemed to be correct)

Hmmm, good point, and I don't know the answer! :-(

Guess it deserves a bugzilla.

Would you be willing to look in the source to see if you can figure out why? Looks like a search for "noise" in iwl-3945.c will lead in the right direction.

-- Ben --

>
>Regards,
> Maxim Levitsky
>
>