01-27-2012 11:56 AM - edited 01-28-2012 01:38 PM
I bought my T420 model with N6205 network card last December, since then, the wireless connection never functions well. Here's the problem(it happens in my apartment):
Every once in a while (normally within four to five days), my wireless connection drops automatically. It would first appear as no connection and it'll try to reconnect, then it appears as successful connected for 5 to 10 seconds(but definitely no internet access), and it'll drop the connection completely again, then automatically repeat :reconnect, drop,reconnect, drop ... never stops. Though I can still use cable to connect to my router to have internet access.
This problem occurs to none of my smartphones, ipad, ipod touch, my old laptop and my roomates' wireless devices under the same wirless environment. They always have solid wireless connection.
Of course, regular approaches have been taken trying to solve the problem:
1. manually disable wireless functionality on my T420, and enable it again
2. reboot computer
3. go to power manager and turn PCI express off
4. uncheck allow the wireless LAN radio to be turned off when inactive
5.updated to the latest driver through lenovo
6. restart router
So it may be that I've got a bad router? This is why I didn't post my problem in the first place, since I was hoping it may disappear with other routers.
I changed to a new router, the problem persists.
There's no way I can restart the router every time when my laptop looses connection, it'll affect the other users.
Based on the description of my problem, I believe there's a great chance there's something wrong with my T420 rather than with my router.
Is there anybody who can help me with this?
Can lenovo staff see this post?
Any suggestion about who I should turn to?
Thanks a lot.
i7 2640M, N6205
Windows 7 professional, 64 bit
01-27-2012 05:28 PM
01-30-2012 11:25 AM
Did you try your wireless connection in annother wireless netzwork sucessfully (office, neighbour/friend, hotspot...)
If your wireless works well in other networks the reason is either your wireless configuration or in the router. In some cases a firmware update in the router helps.
03-25-2012 06:41 AM
What security mode are you using.
WPA or WPA2? You could change the router to WPA only and see if that helps. I have see some portable devices that don't negotiate the protcol properly but never a notebook. If you have Bluetooth turn it off. It seems to affect my 1x1.
I have the 1x1 card and it pretty bad connecting at 24 to 48 Mbps only with a good signal. I don't know why Realtek is used in a Business class notebook. Maybe some others can add what they have and is working 100%.
07-16-2012 12:14 PM
07-18-2012 06:33 AM
07-18-2012 06:38 AM
07-31-2012 06:37 AM
Has anyone found the solution yet? Lenovo please speak up. I will add a bit more information:
1. T420 was originally running Win7-32. It worked fine
2. Router hasn't changed and is running wireless g-n mode with WPA2
3. T420 was upgraded to Win7-64 with all the latest drivers (including Intel Pro1000).
4. Problem started happening.
5. Able to connect to non-encrypted networks with no problems.
6. No other devices have ANY issues connecting (iPads, iPhones, Laptops, etc...)