Thread: [Madwifi-users] AR5418: erratic ping times and packet loss
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From: Pablo S. <pa...@bl...> - 2008-07-02 18:08:34
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Hi, I'm having a couple of issues with my wireless card: 1) Erratic ping times and 2) Severe packet loss. Below are some details. I hope it's not too much, nor too little! :) Thank you for your help. Environment =========== Wireless Card ------------- 0c:00.0 Network controller: Atheros Communications Inc. AR5418 \ 802.11abgn Wireless PCI Express Adapter (rev 01) madwifi Version --------------- I pulled svn 3747. Issues ====== Erratic `ping' times -------------------- I have a desktop and the laptop (with the wireless card). The desktop is connected to the same switch as the AP (Senao 2611). `athstats' reports an rssi of 59-60. Issuing a `ping -c100' from the laptop to the desktop, I see the following statistics: --- fly.hillsandlakes.com ping statistics --- 100 packets transmitted, 85 received, 15% packet loss, time 99370ms rtt min/avg/max/mdev = 2.206/106.866/517.117/141.091 ms Packet Loss ----------- As the above `ping' statistics show, I'm also getting very bad packet loss. What I've tried =============== I tried using the `ath5k' module however my chipset isn't supported. The above tests were with the `ath_pci' driver. Using NDISwrapper, everything works very well _however_ I get random `resets' which results in my machine needing to be rebooted. By working well, I mean there are no packets loss and the ping times are in the 4ms range. At a minimum, NDISwraper suggests the card is not defective. -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) |
From: Pablo S. <pa...@bl...> - 2008-07-14 01:31:12
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Howdy, I never received any responses to the following. Any input would be greatly appreciated. Cheers, -pablo On Wednesday 02 July 2008 at 2:08 pm, Pablo Sanchez penned about "[Madwifi-users] AR5418: erratic ping times and packet loss" > Hi, > > I'm having a couple of issues with my wireless card: > > 1) Erratic ping times and > 2) Severe packet loss. > > Below are some details. I hope it's not too much, nor too little! :) > > Thank you for your help. > > Environment > =========== > Wireless Card > ------------- > 0c:00.0 Network controller: Atheros Communications Inc. AR5418 \ > 802.11abgn Wireless PCI Express Adapter (rev 01) > > madwifi Version > --------------- > I pulled svn 3747. > > Issues > ====== > Erratic `ping' times > -------------------- > I have a desktop and the laptop (with the wireless card). The desktop > is connected to the same switch as the AP (Senao 2611). `athstats' > reports an rssi of 59-60. > > Issuing a `ping -c100' from the laptop to the desktop, I see the > following statistics: > > --- fly.hillsandlakes.com ping statistics --- > 100 packets transmitted, 85 received, 15% packet loss, time 99370ms > rtt min/avg/max/mdev = 2.206/106.866/517.117/141.091 ms > > Packet Loss > ----------- > As the above `ping' statistics show, I'm also getting very bad packet > loss. > > What I've tried > =============== > I tried using the `ath5k' module however my chipset isn't supported. > > The above tests were with the `ath_pci' driver. > > Using NDISwrapper, everything works very well _however_ I get random > `resets' which results in my machine needing to be rebooted. By > working well, I mean there are no packets loss and the ping times are > in the 4ms range. > > At a minimum, NDISwraper suggests the card is not defective. -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) |
From: Pablo S. <pa...@bl...> - 2008-07-18 10:27:04
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Hi, I never heard anything regarding the following so ... I yanked the card. :p I guess I'll ebay it .... :( Cheers, -pablo On Wednesday 02 July 2008 at 2:08 pm, Pablo Sanchez penned about "[Madwifi-users] AR5418: erratic ping times and packet loss" > Hi, > > I'm having a couple of issues with my wireless card: > > 1) Erratic ping times and > 2) Severe packet loss. > > Below are some details. I hope it's not too much, nor too little! :) > > Thank you for your help. > > Environment > =========== > Wireless Card > ------------- > 0c:00.0 Network controller: Atheros Communications Inc. AR5418 \ > 802.11abgn Wireless PCI Express Adapter (rev 01) > > madwifi Version > --------------- > I pulled svn 3747. > > Issues > ====== > Erratic `ping' times > -------------------- > I have a desktop and the laptop (with the wireless card). The desktop > is connected to the same switch as the AP (Senao 2611). `athstats' > reports an rssi of 59-60. > > Issuing a `ping -c100' from the laptop to the desktop, I see the > following statistics: > > --- fly.hillsandlakes.com ping statistics --- > 100 packets transmitted, 85 received, 15% packet loss, time 99370ms > rtt min/avg/max/mdev = 2.206/106.866/517.117/141.091 ms > > Packet Loss > ----------- > As the above `ping' statistics show, I'm also getting very bad packet > loss. > > What I've tried > =============== > I tried using the `ath5k' module however my chipset isn't supported. > > The above tests were with the `ath_pci' driver. > > Using NDISwrapper, everything works very well _however_ I get random > `resets' which results in my machine needing to be rebooted. By > working well, I mean there are no packets loss and the ping times are > in the 4ms range. > > At a minimum, NDISwraper suggests the card is not defective. -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) |
From: Michael R. <mre...@ma...> - 2008-07-21 11:50:38
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Hi. Pablo Sanchez wrote: > `athstats' reports an rssi of 59-60. That's pretty much. > 100 packets transmitted, 85 received, 15% packet loss, time 99370ms It could be a case of "signal too strong": http://madwifi.org/wiki/FAQ/SignalTooStrong Bye, Mike |
From: Pablo S. <pa...@bl...> - 2008-07-28 13:18:26
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On Monday 21 July 2008 at 7:50 am, Michael Renzmann penned about "Re: [Madwifi-users] AR5418: erratic ping times and packet loss" > Hi. > > Pablo Sanchez wrote: > > `athstats' reports an rssi of 59-60. > > That's pretty much. > > > 100 packets transmitted, 85 received, 15% packet loss, time 99370ms > > It could be a case of "signal too strong": > http://madwifi.org/wiki/FAQ/SignalTooStrong > Hi Mike, Thank you for the tip. I've done so many different tests, I can't recall if I've ever done a test where I brought my laptop to another AP (which isn't as close). I'll try ratcheting the power down; I'll need to re-install the card. I'll report back later this week. Cheers, -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) |
From: Pablo S. <pa...@bl...> - 2008-08-18 15:08:17
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On Monday 21 July 2008 at 7:50 am, Michael Renzmann penned about "Re: [Madwifi-users] AR5418: erratic ping times and packet loss: > Hi. > > Pablo Sanchez wrote: > > `athstats' reports an rssi of 59-60. > > That's pretty much. > > > 100 packets transmitted, 85 received, 15% packet loss, time > > 99370ms > > It could be a case of "signal too strong": > http://madwifi.org/wiki/FAQ/SignalTooStrong Hi, I finally got around to testing the above and unfortunately even after making nsome tweaks, I'm still seeing the same problem: o lost packets o excessively long ping times `athstats 1' reports an RSSI of 55-56 I've `iwconfig'd the card to use a `txpower' of `3db' Is there additional debug data I can provide to resolve the issue? Thank you. Cheers, -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) |
From: Michael R. <mre...@ma...> - 2008-08-25 05:56:30
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Hi. Pablo Sanchez wrote: > `athstats 1' reports an RSSI of 55-56 I've `iwconfig'd the card to > use a `txpower' of `3db' Which, from what I understand, turns down the TX power of the client card, but leaves the TX power of the AP unchanged. The assumed issue here is that the *received* signals are too strong, so the sender of these signals probably should use less TX power. Bye, Mike |
From: Pablo S. <pa...@bl...> - 2008-08-25 13:33:42
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On Monday 25 August 2008 at 1:56 am, Michael Renzmann penned about "Re: [Madwifi-users] AR5418: erratic ping times and packet loss" > Hi. Hi Mike, > Pablo Sanchez wrote: > > `athstats 1' reports an RSSI of 55-56 I've `iwconfig'd the card to > > use a `txpower' of `3db' > > Which, from what I understand, turns down the TX power of the client > card, but leaves the TX power of the AP unchanged. The assumed issue > here is that the *received* signals are too strong, so the sender of > these signals probably should use less TX power. I understand what you're saying. The problem I'm having is reconciling the above with my experience with openSUSE 10.3 and `ndiswrapper' When I used `ndiswrapper' and the same test environment (AP next door, etc), all works very well: no lost packets and ping packets within 2ms (faster than madwifi). I upgraded to openSUSE 11.0, `ndiswrapper' stopped working so I tried madwifi. After several kernel upgrades on openSUSE 11.0, I'm trying `ndiswrapper' again (now) to see if the original problem has been fixed. I had reported my initial problems to ndiswrapper and they suggested I use madwifi. :) I'm more than willing to do any necessary data collection to debug the problem on the madwifi side. Cheers, -- Pablo Sanchez - Blueoak Database Engineering, Inc Ph: 819.459.1926 Fax: 760.860.5225 (US) |