DWL-G520 low signal, low speed

Sat Jan 13 12:22:32 UTC 2007

sorry no netstat but "systat -v"

Trigve

----- Original Message ----
From: Trigve Siver <trigves at yahoo.com>
To: freebsd-hardware at freebsd.org
Sent: Saturday, January 13, 2007 1:13:35 PM
Subject: Re: DWL-G520 low signal, low speed

Hi,

Sa thing has changed .... 2 day ago I have tried what happen if I try to use ndis on my wifi card (windows drivers)...so I created drivers with ndis and...it was working a better than native freebsd ath driver so I was using till today...today I have updated to FreeBSD 6.2 PRERELEASE (can't cvs to main server where 6.2 RELEASE is) newest version build world, kernel (removed ath
 driver from kernel ) and try to use once again ath driver but now as a module....and now it is working a better than it was working days before...it si working like ndis but a little little slower...

$ifconfig ath0
ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    inet 192.168.1.15 netmask 0xffffff00 broadcast 192.168.1.255
    ether 00:17:9a:af:62:da
    media: IEEE 802.11 Wireless Ethernet autoselect (OFDM/48Mbps)
    status: associated
    ssid 3Com channel 11 bssid 00:12:a9:c4:41:22
    authmode WPA privacy ON deftxkey UNDEF TKIP 4:128-bit txpowmax 36
    bmiss 7 protmode CTS burst roaming MANUAL bintval 100 

I have speed 54Mbps but somehow it is now "only" 48Mbps

$athstats
17 tx management frames
52 tx frames discarded prior to association
2 tx failed
 'cuz too many retries
15011 long on-chip tx retries
15 tx frames with no ack marked
84682 tx frames with short preamble
2729 tx frames with an alternate rate
1882 rx failed 'cuz of bad CRC
231520 rx failed 'cuz of PHY err
    94489 OFDM timing
    137031 CCK timing
45 periodic calibrations
rssi of last ack: 30
avg recv rssi: 30
Antenna profile:
[1] tx    41995 rx   164885
[2] tx    42699 rx       43 

So it looks like as a module, it is working ok...and I have started that ath driver only from /etc/rc.d/netif and not from boot must try that also... and also I remember that when I was using ath as build-in kernel driver, sometimes ath driver has about 5000 interrupts when watching system load and so with netstat

Trigve

----- Original Message ----
From: Sam Leffler
 <sam at errno.com>
To: Milan Obuch <freebsd-hardware at dino.sk>
Cc: freebsd-hardware at freebsd.org
Sent: Saturday, January 13, 2007 7:40:47 AM
Subject: Re: DWL-G520 low signal, low speed

Milan Obuch wrote:
> On Saturday 13 January 2007 05:14, Sam Leffler wrote:
>> Trigve Siver wrote:
>>> Hi,
>>> 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
>>>
>>> $ dmesg -a |grep ath
>>> ath_hal: 0.9.17.2 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413,
>>> RF5413) ath0: <Atheros 5212> mem 0xe7000000-0xe700ffff irq 19 at device
>>> 2.0 on pci2 ath0: Ethernet address: 00:17:9a:af:62:da
>>> ath0: mac 7.9 phy 4.5
 radio 5.6
>>> ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 150
>>>
>>> rc.conf:
>>> ifconfig_ath0="WPA inet 192.168.1.15  netmask 255.255.255.0 mode 11g"
>>>
>>> $ ifconfig ath0
>>> ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>>>         inet 192.168.1.15 netmask 0xffffff00 broadcast 192.168.1.255
>>>         ether 00:17:9a:af:62:da
>>>         media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
>>> (DS/11Mbps) status: associated
>>>         ssid 3Com channel 1 bssid 00:12:a9:c4:41:22
>>>         authmode WPA privacy ON deftxkey UNDEF TKIP 3:128-bit txpowmax
 36
>>>         bmiss 7 protmode CTS burst roaming MANUAL bintval 100
>>>
>>> Anyone could help?
>> I see no indication of rssi on freebsd or any statistics to show issues
>> with lost packets.  gentoo likely uses madwifi which uses the same hal
>> (or older) than what is in freebsd.  As such I'd expect no difference in
>> operation wrt signal or link level behaviour.
>>
> 
> Unfortunately, this is the case here too. On one link, approx. 3 km distance, 
> I got no link with both sides FreeBSD, athstats reported rssi 6 when one side 
> was changed to Linux with madwifi, and rssi 23 when both sides were Linux. I 
> was forced to use Linux on all radio links due this. I would like to repeat 
> this test indoor, but did not have time yet. This drives me crazy because I 
> am forced to use system I
 don't like :(

Makes no sense but there's not much I can say.  I know how both drivers
work and there's no reason for it.

    Sam
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