Date: Sun, 14 Jan 2007 06:28:37 -0800 (PST) From: Trigve Siver <trigves@yahoo.com> To: freebsd-hardware@freebsd.org Subject: Re: DWL-G520 low signal, low speed Message-ID: <20070114142837.13776.qmail@web52714.mail.yahoo.com>
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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@cydem.org" <soralx@cydem.org> To: freebsd-hardware@freebsd.org Cc: trigves@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 _______________________________________________ freebsd-hardware@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "freebsd-hardware-unsubscribe@freebsd.org" ____________________________________________________________________________________ Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. http://answers.yahoo.com/dir/?link=list&sid=396546091
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