X220 Strange Internet connectivity issue

[daveboston]

I am fairly technical and usually able to troubleshoot most problems, but I am stumped.  

I have had intermitted loss of internet connectivity since shortly after (maybe right away) I bought my X220 a few months ago.  The machine will lose internet connectivity and regain it randomly.  Other machines working through the same router will have internet connectivity and the X220 has no problem directly connecting to the router.  It does not appear to be a DNS issue since I try pinging 8.8.8.8 as a test.  I am able to log into my router just fine though.  It is very strange that the router connects to the internet, I connect to the router but the computer doesn't connect to the internet.  I assume this has some software component to the problem, but don't know what.

The issue are worse when I am using mobile broadband, but still occurs at my house.

System Configuration

X220 4286CTO

Core i5-2410 2.3ghz

Windows 7 64bit Home Premium

Bios: 8DEET50WW 1.2 7/7/2011

4GB

Intel Centrino Andavnced-N Wimax 6250

- Intel Centrino Andavnced-N AGN Driver v14.0.1.2 12/21/2010

- Intel Centrino WiMax 6250 Diver v6.2.1007.26 1/18/2011

Other Network Adapters Installed

- Blueooth PAN

- Bluetoooth RFCOMM Protocol TD

- Hamachi Network Interface

- Intel 82568LM Gigagbit

- MSFT Virtual WiFi Miniport Adaptner

- PDANet Broadband Adapter

Have Access Connections installed

[Serge1410]

hey daveboston,

welcome to the forums.

it's hard to say what's going on here but if you could, could you uninstall the current network drivers (wireless and wired) from your system and then let win7 install its generic drivers. Also remove all other network adapters that you have listed.

once generic drivers has been installed, test your unit with your router via wireless as well as wired connection.

see if there is any difference then head over to http://support.lenovo.com , download and install the wired and wireless network driver for your unit and test again.

[4286RY7]

I  have the similarly problem, my x220 cann't connect to internet through WIFI!

I uninstall WIFI driver and let Win7 install the driver, but it cann't connect to internet !

And then, I install the latest WIFI driver, the problem keeps the same.

Can you help me ?

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Serge1410 schrieb:
hey daveboston,

welcome to the forums.

it's hard to say what's going on here but if you could, could you uninstall the current network drivers (wireless and wired) from your system and then let win7 install its generic drivers. Also remove all other network adapters that you have listed.

once generic drivers has been installed, test your unit with your router via wireless as well as wired connection.

see if there is any difference then head over to http://support.lenovo.com , download and install the wired and wireless network driver for your unit and test again.

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[daveboston]

Before I saw your response, I went in and disabled all other network adapters other than the LAN cable and Wifi to see what would happen.  So far I am 36 hours in without a connectivity problem, however, it was intermittent before so we will see.  I will also want to test it on more shaky connections where the problem was more amplified.