Problem with T500 Intel 5300 AGN WiFi fixed...

I finally found the solution to my problem today, and I write this information in the hopes that someone can verify in their environment, what I found in mine.  Also in the hope that it will save someone else the weeks of effort it took resolve.

To summarize, my problem was that I was able to stream audio or video from my local network or from the internet without losing connectivity frequently or permanently.  This problem started when several months ago I updated my laptop for Win 7 Professional of Vista Business.  I don't meet with the problem in Vista.

Today, I have determined that the problem is that I am under mixed mode on my LAN that is apparently supported by Win 7 for the Intel 5300 driver.  My router is D - Link DIR-655, which is a 802.11n router can be configured for mixed mode support.  I'm running that he configured for support because my wife's cell phone supports n and g as g.  I booted up my laptop today and I began an audio stream from my server and to my surprise it worked perfectly, just as it should.  I listened for a while and all of a sudden the music started to jump.  I noticed that my wife had started just his cell phone around the same time the jump began.  On a long shot, I went to the advanced configuration of the 5300 and disabled 802.11n support forcing them to disconnect and reconnect to 54 Mbps.  This action restored my audio stream immediately and I progressed to test several LAN and WAN connectivity actions (browser, e-mail, etc.) which previously guaranteed a discontinuity in the flow.  Everything continued to work exactly as you would expect.

I feel that the problem is with the driver 5300 rather than my router because to solve the problem, I have disabled 802.11n on the 5300, not on the router.  The D-Link still works in mixed g/n mode 802.11.  Also, I have a laptop Lenovo T61, which also has a good Intel WiFi AGN adapter to a different model.  This laptop works in n mode with no connection problems, either via the same router D-Link.

I hope that someone else on this forum allows to reproduce my results in their LAN/WAN environment to confirm that there is a problem with the driver Win 7 currently available for the 5300.  Thanks to Lenovo technicians, who spent several hours on the phone with me and even sent me a new adapter 5300 at a time, thinking that maybe the problem.

Okay, more than 24 hours now without any problems, 2.4 ghz and full rate of 270/300.  As with the GSM card, I tried the latest vista driver intel 5300 and poof, no problem loading.

I decided to do so after testing with some dual-band routers.  I noticed that it worked well on 5 GHz, but if it is locked at 2.4 it had problems with all routers.  It also worked well with dlink adapter USB N on 2.4 ghz.

Since he had worked in vista with 2.4 ghz, I decided to try this driver and was able to put all the settings back to full (power transmission, optimizations, etc.).

13.0.0.107? seems to have a bug of driver at 2.4 ghz.  The exact version is 12.4.4.5.  So far I have found no side effects (except without freezes or crashes on the 5300).

So, hope this works for others, if all goes well, next version of the driver it will solve, but mine works fine for now.

-j

Tags: ThinkPad Notebooks

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