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Intel 4965agn PCIe + weird WiFi slowness

This is totally new and weird, with too many variables for my pea brain.

Have a home network that runs fine - DSL line with Linksys BEFSX41 router

Wifi is only 802.11b using an old Linksys WAP11 access point... several XP laptops, desktops, Tivo, WET11 bridge + xbox360 all run fine

ok - new to the mix - a Sony Vaio laptop with the Intel 4965AGN internal WiFi card. This laptop is running Vista...

SO - fire it up and test a few things.... Speakeasy speed tests Pingplotter tests

Weird #1 - rampup or TCP sliding window ? Speakeasy - on one download test it showed starting 100k then ramped up to 2400k repeated tests just showed the same ramp-up to 2400k Just turned off the WiFi, and plugged in an ethernet cable consistently at 2400k download - no ramp-up

Weird #2 - Pingplotter using Pingplotter and also having a couple other WiFi laptops running PP had them all ping one of our remote server sites. All the other laptops - had no errors, no packet loss, etc The Sony had from 3% up to 25% packet loss... almost like a repeating cycle. Again - disabled the WiFi and plugged in the cable.... no errors - all good

SO - since both the WiFi and the ethernet cable have to go thru the same TCP/IP stack it can't really be anything new that MS totally changed in the stack (they did totally change it) and it must be something strictly related to the WiFi world ???

Ideas ??

Reply to
P.Schuman
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ok - more weirdness - I had already : in the protocol screen, unchecked IPv6 in the adapter properties, Disabled N-mode, Enabled B/G mode

then - for grins, tried just Enabled B mode Ran the PingPlotter - no errors ! ok - control case - go back Enable B/G mode Ran PP again... expecting errors... BUT - NO Errors !

hmmm - rebooted, running PP now, and NO errors. So, I'm not sure what changed, as the packet loss testing was for the past week, and now, all of a sudden, on this single Vista laptop - it WORKS !

Reply to
P.Schuman

well - I think I found the problem.... I had the Sony Vaio upstairs, running PingPlotter in the background all morning while it was charging.... NO errors or lost packets.

I unplugged it, and brought it downstairs to the family.... things were a little sluggish on the net, so I looked at PingPlotter - LOST PACKETS again. hmmmm - what's different ??

DING !!!! - the power saving mode

Click on the Vista battery icon and go look at all the power settings.

There is one area of Advanced Settings where it kinda looks like Device Manager with lots of "+" boxes to expand. One of the "+" boxes was for the Wireless Adapter ->

currently set for Medium Power Saving

hmmm - Changed to Max Performance vs Max or Medium Power saving and BINGO - no lost packets.

I'm guessing that maybe the WiFi card was being powered down between Pings, and was maybe loosing the initial sends/replies... I don't know exactly BUT - now, I am using the same battery profile for "max battery" only with the Wireless Adapter now set to Max Performance to keep it powered up...

Reply to
P.Schuman

In news:vZeGi.2240$ snipped-for-privacy@newssvr22.news.prodigy.net, P.Schuman typed on Thu, 13 Sep 2007 13:06:01 -0500:

Good show Schuman! :D

Reply to
BillW50

I saw something similar with a Gateway laptop that uses a Realtek chip on mini-PCI card for wireless. While web browsing, it would often fail to load a page or part of a page, yet refreshing would generally get the data. All other machines in the house were having no problems while using the same access point and cable modem.

As soon as I disabled power saving (via the Realtek utility), the dropped packets went away.

To be fair to Gateway, they don't provide any visible way to enable power saving and get the system in that state. I had disabled the wretched Microsoft "zero config" wireless connection manager and installed Realtek's utility in its place, and that's where I found the power saving option, tried changing it, and then forgot about it for a while.

Dave

Reply to
Dave Martindale

Wow that is weird. I have two HP ADM desktops (the same model) that one quit working from any wireless card or the Ethernet built in to the motherboard. Swapped drives and cards between them and then both quit working with the network. Tried at least three different wireless cards and it is a no go.

The only thing that makes sense is the original wireless card went bad and had taken something out on both motherboards. I don't know. I scrapped one for parts and the other works with HomePNA USB believe it or not. That and the dialup modem are the only things I can get to work to get Internet access on these two.

Reply to
BillW50

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