DWL-G520 low signal, low speed

[Trigve Siver]

Hi,

One more thing I want to add is...that when I was using ath I have had low speed and also had a lot of interupts and I realised that ath was sharing IRQ with USB (IRQ 19 in my case)... so I disabled the USB and throw away ath from kernel and compile it as module (want to take some performance test with ndis and ath)...and after that I have still low signal but media is OFDM/54 Mbps and is stable... to the performance....I think that ndis is somehow a little faster...when dowloading/uploading about 100 kB/s faster...but haven't done some serious testing (don't know how maybe with kismet?)

Trigve

----- Original Message ----
From: "soralx at cydem.org" <soralx at cydem.org>
To: freebsd-hardware at freebsd.org
Cc: trigves at yahoo.com
Sent: Sunday, January 14, 2007 12:52:06 PM
Subject: Re: DWL-G520 low signal, low speed


> >>> I have a problem with my wifi DWL G520 atheros chip based card...
> >>> I have low signal only 20-30% and also a low speed 5-11
> >>> Mbit/s..router is only 1-2 m away from me and with gentoo I have
> >>> 90% signal strength..I'm using FreeBSD 6.2 PRERELEASE

Same thing here, folks. When using the 'if_ath' module (or compiling the
driver into kernel -- doesn't matter), the reported signal strength
(via `ifconfig ath0 up && ifconfig ath0 scan`) is about 20:0 to 30:0
(whatever the units are?), depending on spatial orientation, and being
positioned ~10m away from the base station. The 'media:' quickly
degrades to 'DS/1Mbps'. Measurement of the signal strength with notebook
relocated right near the transceiver yield values of 50-60 units (noise
has the value of '0' all the time).

Perhaps the ndisulator is being overly optimistic, but it reports S:N
of ~140:0 when away from the transiever, and ~160:0 when near. ifconfig
says that media is OFDM/54Mbps. I says that probably the units are
totally arbitrary, or the ndis driver is just being piss-proud [i.e.,
exaggerating a little, and his signal is not really that big] ;)

Now, I didn't do any real performance comparison yet (ath vs ndis), but
I can say this: ath performance seems to me rather disappointing -- the
carrier gets lost from time to time, range is not impressive (or am i
just expecting too much?), there's absolutely no reception without
antenna connected (I believe this isn't right), etc...

I don't have much time to look into the issue now, but if someone will
suggest how to do some advanced testing (at almost a step-by-step
level), I would do that.

OS: 6.2-BETA2

[SorAlx]  ridin' VN1500-B2
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