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Posts: 10
Registered: ‎06-09-2008
Location: UK
Views: 2,236
Message 1 of 7

Lenovo T410 Wireless N pauses (g better but not perfect)

I have a brand new T410 with intel wireless 6200 abgn, wireless N performance is poor when streaming video etc.

 

I have done quite a lot of work and updated driver to latest 13.4.0.9 and also tried both winXP and Win7 pro 64 bit, both the same.

 

Problem:

When streaming wireless N @ 300mbs, even if 6 feet from the access point (Draytek 2820 bgn) after varying times, up to 2 minutes, wireless network traffic will pause for between 1 second to maybe 10 seconds or more then 'wake up' The signal always shows 300mbs connection, so not connectivity, performance monitor shows no lost packets and of course when video buffer runs out (5 sec) then video stops.  If the pause is not too long, the video stream will re-start., but not a great viewing experience as a result. Even if I cut the video stream rate to just 3mbit/s it stops stream for 5-10 seconds every 2-3 minutes, worse if I stream at full speed 8mbit/s.

 

I also checked wireless performance with iperf to check max wireless data xfer speed connected at a steady 300mbit/s  wireless N, single TCP datastream stream, but xmit is  a steady 27.5mbit/s max over 30 seconds but receive 22mbit/s max can drop to zero, yes 0mbit/s  for up to 3 seconds in a 30second burst . the test from wireless  to a GbE wired PC on the router GbE port , If I checked the 6200 stats, it shows nothing either, all traffic is in one the '2x54 and 2x60mbit/s fast lanes', it is like the adapter is sleeping.  If I stream 2 data streams wireless N with iperf I get a sum transmit  rate of 45-47mbit/s (23+23) but the sum receive rate is stuck at 20-25mbit (13+13) , varies wildly and dops to zero/near zero at the same time on both streams. 

UDP performance in wireless N was not good either.

 

Originally the pb was the same on wireless g as well also just 6 feet from the router, I got a new T410 wireless card under warranty and now wireless g is better, but still odd smaller drop offs in traffic of 1-2mbit/s,  but acceptable with max transmit speed of 20.5mbits/s and receive of 22mbits/s, I would be happy with that., Streaming video still pauses now and again as network traffic stops/pauses, but noy for long enough usually to affect video streaming. Throughput is very close to my T60 wireless g speed in fact, just not as steady... Wireless signal strengths seem comaparable as well.

With the new wireless card the wireless N is a bit better, can run up to 2-3 minutes but it is still real bad even with the new mini pci wireless card. 

 

I have a belkin wireless bg AP and the draytek bgn AP, when in wireless g it is much better on both APs since the new card fitted, T410 connects up at solid 54mbit/s 54g , not so bad but still see some network pause but rare.  Wireless N is still bad, I tweaked draytek wireless N settings, greenfield mode, 20 and 40mbs channel, no turbo, max power, no nearby wireless, tried no encryption, other AP turned of, wireless N only mode,,,cannot get it working. Tweaked T410 6200 settings, max power etc, co change.

 

Just to be sure, streaming over the GbE adapter is perfect and iperf gave max speed of >300mbits/s both ways, constant, so I guess the OS winXP and win7 side of things is ok.

 

If I compare the performance of the new T410 with my outgoing T60 3495abg wireless winXP SP3, T60 wins hands down, perfect streaming, solid , no speed pauses all round the house the last 4 years.

 

Just to rule out my draytek 2820 wireless bgn router, I  did similar test on wireless N only to a 9 year old IBM T23 thinkpad with a Netgear Draft N pcmcia adapter, it performed better than the T410 with iperf and streaming the same video over wireless N, no stops and stutters, constant net traffic of 3mbit/s  and connected at draytek AP at 270mbit/s WPA2..

 

I am stumped, I am just pretty sure it is a wireless N only receive pb. Is there any chance it could be an aerial pb, if so I guess I will send it away for repair to fix that under warranty.

 

Anybody out there with any ideas ?

 

Many thx

 

Typical Iperf stats below 30sec xmit/receive test wireless N, 5 feet from AP:

 

bin/iperf.exe -s -P 1 -i 1 -p 5001 -f k
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 1012 KByte (default)
-----------T410 Transmit performance below-------------------------------------------------
[1872] local 192.168.1.206 port 5001 connected with 192.168.1.201 port 1428
[ ID] Interval       Transfer     Bandwidth
[1872]  0.0- 1.0 sec  3296 KBytes  27001 Kbits/sec
[1872]  1.0- 2.0 sec  3344 KBytes  27394 Kbits/sec
[1872]  2.0- 3.0 sec  3328 KBytes  27263 Kbits/sec
[1872]  3.0- 4.0 sec  3312 KBytes  27132 Kbits/sec
[1872]  4.0- 5.0 sec  3264 KBytes  26739 Kbits/sec
[1872]  5.0- 6.0 sec  3232 KBytes  26477 Kbits/sec
[1872]  6.0- 7.0 sec  3232 KBytes  26477 Kbits/sec
[1872]  7.0- 8.0 sec  3280 KBytes  26870 Kbits/sec
[1872]  8.0- 9.0 sec  3344 KBytes  27394 Kbits/sec
[1872]  9.0-10.0 sec  3296 KBytes  27001 Kbits/sec
[1872] 10.0-11.0 sec  3248 KBytes  26608 Kbits/sec
[1872] 11.0-12.0 sec  3272 KBytes  26804 Kbits/sec
[1872] 12.0-13.0 sec  3272 KBytes  26804 Kbits/sec
[1872] 13.0-14.0 sec  3312 KBytes  27132 Kbits/sec
[1872] 14.0-15.0 sec  3280 KBytes  26870 Kbits/sec
[1872] 15.0-16.0 sec  3280 KBytes  26870 Kbits/sec
[1872] 16.0-17.0 sec  3272 KBytes  26804 Kbits/sec
[1872] 17.0-18.0 sec  3320 KBytes  27197 Kbits/sec
[1872] 18.0-19.0 sec  3312 KBytes  27132 Kbits/sec
[1872] 19.0-20.0 sec  3328 KBytes  27263 Kbits/sec
[ ID] Interval       Transfer     Bandwidth
[1872] 20.0-21.0 sec  3312 KBytes  27132 Kbits/sec
[1872] 21.0-22.0 sec  3312 KBytes  27132 Kbits/sec
[1872] 22.0-23.0 sec  3344 KBytes  27394 Kbits/sec
[1872] 23.0-24.0 sec  3296 KBytes  27001 Kbits/sec
[1872] 24.0-25.0 sec  3152 KBytes  25821 Kbits/sec
[1872] 25.0-26.0 sec  3312 KBytes  27132 Kbits/sec
[1872] 26.0-27.0 sec  3336 KBytes  27329 Kbits/sec
[1872] 27.0-28.0 sec  3176 KBytes  26018 Kbits/sec
[1872] 28.0-29.0 sec  3304 KBytes  27066 Kbits/sec
[1872] 29.0-30.0 sec  3304 KBytes  27066 Kbits/sec
[1872]  0.0-30.0 sec  98704 KBytes  26939 Kbits/sec

------------------------------------------------------------
Client connecting to 192.168.1.201, TCP port 5001
TCP window size: 48.0 KByte (default)
-----------------T410 Receive performance below..bad bits in red-------------------------------------------
[1840] local 192.168.1.206 port 1813 connected with 192.168.1.201 port 5001
[ ID] Interval       Transfer     Bandwidth
[1840]  0.0- 1.0 sec  2592 KBytes  21234 Kbits/sec
[1840]  1.0- 2.0 sec  2320 KBytes  19005 Kbits/sec
[1840]  2.0- 3.0 sec  2496 KBytes  20447 Kbits/sec
[1840]  3.0- 4.0 sec  1968 KBytes  16122 Kbits/sec
[1840]  4.0- 5.0 sec  2576 KBytes  21103 Kbits/sec
[1840]  5.0- 6.0 sec  2320 KBytes  19005 Kbits/sec
[1840]  6.0- 7.0 sec  2240 KBytes  18350 Kbits/sec
[1840]  7.0- 8.0 sec  2408 KBytes  19726 Kbits/sec
[1840]  8.0- 9.0 sec  2304 KBytes  18874 Kbits/sec
[1840]  9.0-10.0 sec  2032 KBytes  16646 Kbits/sec
[1840] 10.0-11.0 sec  1648 KBytes  13500 Kbits/sec
[1840] 11.0-12.0 sec  2464 KBytes  20185 Kbits/sec
[1840] 12.0-13.0 sec  2216 KBytes  18153 Kbits/sec
[1840] 13.0-14.0 sec  0.00 KBytes  0.00 Kbits/sec
[1840] 14.0-15.0 sec  0.00 KBytes  0.00 Kbits/sec
[1840] 15.0-16.0 sec   584 KBytes  4784 Kbits/sec
[1840] 16.0-17.0 sec  2264 KBytes  18547 Kbits/sec
[1840] 17.0-18.0 sec  2520 KBytes  20644 Kbits/sec
[1840] 18.0-19.0 sec  2568 KBytes  21037 Kbits/sec
[1840] 19.0-20.0 sec  2296 KBytes  18809 Kbits/sec
[ ID] Interval       Transfer     Bandwidth
[1840] 20.0-21.0 sec  2496 KBytes  20447 Kbits/sec
[1840] 21.0-22.0 sec  2504 KBytes  20513 Kbits/sec
[1840] 22.0-23.0 sec  1960 KBytes  16056 Kbits/sec
[1840] 23.0-24.0 sec  2344 KBytes  19202 Kbits/sec
[1840] 24.0-25.0 sec  2568 KBytes  21037 Kbits/sec
[1840] 25.0-26.0 sec  2368 KBytes  19399 Kbits/sec
[1840] 26.0-27.0 sec  2616 KBytes  21430 Kbits/sec
[1840] 27.0-28.0 sec  2488 KBytes  20382 Kbits/sec
[1840] 28.0-29.0 sec  2528 KBytes  20709 Kbits/sec
[1840] 29.0-30.0 sec  2480 KBytes  20316 Kbits/sec
[1840]  0.0-30.0 sec  64176 KBytes  17506 Kbits/sec
Done.

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Posts: 10
Registered: ‎06-09-2008
Location: UK
Views: 2,150
Message 2 of 7

Re: Lenovo T410 Wireless N pauses (g better but not perfect)

Anybody from Lenovo here, I would really appreciate a comment...thx

Lenovo Staff
Lenovo Staff
Posts: 288
Registered: ‎11-28-2007
Location: US
Views: 2,063
Message 3 of 7

Re: Lenovo T410 Wireless N pauses (g better but not perfect)

Try disabling power management of the wireless card.

 

Edit each profile under Access Connections and on the Wireless Settings page, go into the Settings for Advanced Configuration.  Set the Power Save Mode to Low (best network performance).
Open Device Manager and open the properties of the Intel wireless card.  Go to the Advanced tab and change this setting.
     Power Management: Uncheck Use default value and move the slider all the way to the right to Highest.

Still in Device Manager, go to the Power Management tab and uncheck any boxes there.

Click Ok and exit.  Then reboot the system.

Guru
Posts: 1,525
Registered: ‎04-20-2010
Location: US
Views: 2,060
Message 4 of 7

Re: Lenovo T410 Wireless N pauses (g better but not perfect)

Try speedtest.net and pingtest.net. You may not have a wireless issue, with the stream pausing. What GPU do you have? Another user just recently has a similar issue with watching any type of flash video. If the speed test and ping test are fine, and you have the latest flash driver, I would try and older flash to see if the issue goes away. Older can be found on filehippo.com for both IE and Non-IE.
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Posts: 10
Registered: ‎06-09-2008
Location: UK
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Message 5 of 7

Re: Lenovo T410 Wireless N pauses (g better but not perfect)

Many thx for the suggestion, I already set transmit power to '5. Highest' in the wireless driver and to 'maximum performance' in access connections for each profile, so it should be at 100% (MAX) already, it is still bad.. I also disabled PCI-X power management in power settings.
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Registered: ‎06-09-2008
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Views: 2,021
Message 6 of 7

Re: Lenovo T410 Wireless N pauses (g better but not perfect)

Hi, again thx, I am realy struggling. I have performance issue with any type of streaming data over wireless, wired ethernet is fine. I have the problem whether it is a large file transfer, video, tcpip data stream or UDP datastream on my local 192.168.x.x lan or downloading video etc over the internet, the wireless throughput just 'pauses' when you look at lan traffic in any of the win7 performance monitors.. So I do not think it is a GPU performance problem, also as I said, wired ethernet is fine.
Speedtest does not really run long enough to show the problem.
Any video app that buffers 10 seconds or more of data works ok, as it can overcome the pauses.

Cheers
jonscaife
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Registered: ‎03-05-2011
Location: UK
Views: 1,870
Message 7 of 7

Re: Lenovo T410 Wireless N pauses (g better but not perfect)

I've been having a problem that matches your description too.  Wireless-N connection drops whenever significant load is put on it.  I've got a Dell Studio 15 Laptop with an Intel 5300 wireless and Win 7 x64 connecting to a Draytek Vigor2820vn.  The laptop doesn't have the problem connected to any other networks.  The problem also goes away if I set the draytek to only operate in Wireless-G mode (well, it becomes so rare as to become irrelevant, 15+ mins between pauses instead of <2mins).  I sent the router back to Draytek who replaced the internal wireless card.  I've tried just about every firmware and setting I can find.  I've also replaced the wireless card with an Intel 6300 card, and tried many different driver versions.  No joy with anything.  I've had many false starts, as the problem is just unpredictable enough to be difficult to test in reasonable time.  I haven't experienced drops when the network has no security, but operating with no security is useless!

 

If you manage to get to the bottom of the problem I'd be really interested.  I'm currently considering opening the Draytek up and inspecting the wireless card in it myself.  I've also wondered if it is possible to replace it, but I don't know how that would work with the draytek firmware.  I believe the wireless card in the router is an "AirCruiser N300" card (based on this image - http://www.thg.ru/network/draytek_vigor_2820vn/draytek_vigor_2820vn_screenshots_7_1.html)

 

I've been documenting my attempts to solve this issue at http://www.jonsguides.com/2010/09/unsolved-strange-wireless-video.html

 

Thanks in advance for any ideas anyone has

 

-edit-

 

I've got Windows 7 updated to SP1 which made no difference, and I've installed the system administrator version of Intel Proset and used the Intel utility instead of the Windows one to manage wireless networks.  No joy with those either.  The most likely culprit seems to be the router / the wireless card in the router

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