Slow/glitchy network on Thinkpad?

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Soundy

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After working fine for months, the network on my ThinkPad R61i has become slow and intermittent. Often after a reboot, it will work fine... then after several hours it will get slower and slower to load pages, sometimes failing to load them entirely. Usually, after several minutes of inactivity, I can refresh a bunch of stalled pages and they'll all load fine, and it will work again okay for a few minutes, then slow down again. Often a reboot will clear it up, but not always.

I use this almost exclusively on WiFi so I don't know if it will happen with a wired network connection. All the other wireless devices in the house work fine - my wife is using her VAIO laptop right beside me with no problems, so I don't think it's something environmental in this part of the house... plus, the problem occurs no matter where in the house I have my ThinkPad. It also happens in other locations (Starbucks, etc.) so that pretty much limits it to a problem with the laptop itself.

Anyone have any insight, something I can check? There's lots of freespace on the %temp% drive, the drive is kept defragged (auto-defrag in Win7), pagefile is set to recommended size. I've run full diagnostics on the memory (MEMTEST) and the drive (WD DLG).
 

etaf

Wayne
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i would update the driver from the manufacturers web site

http://support.lenovo.com/en_US/downloads/default.page?selector=expand

also post an xirrus screen shot - lets see what type of signal the laptop is receiving -


------------------------------------------------------------------------
Run Xirrus Wi-Fi Inspector
Download and install

If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC
Save the file to a USB flash drive or other removable media. Plug it into the working computer with internet access and copy the file and install the program.
You will now need to take a screen shot and copy that back to the working PC and attach the screen shot in a reply on the forum here.

http://www.xirrus.com/Products/Wi-Fi-Inspector.aspx
Direct link to the program is here http://info.xirrus.com/Wi-FiInspectorConfirmation.html

{If the above link does not work heres another link http://www.pcworld.com/downloads/file_download/fid,77196-order,4/download.html}

Then run and install the program - on a wireless enabled PC/Laptop
if you get an error - You need will need to have NET Framework installed for the WiFi Inspector to function.
On windows 8 - (i do not have windows 8) but, it would appear that, When you first try to run, you may get a message that .net framework is needed, and included in that message is a link to download/install.

Run the program

A user guide is available here http://www.xirrus.com/cdn/pdf/Xirrus-Wi-Fi-inspectorguide-1-2-1-RevB-6.aspx

post a screen shot of the program running.
if there are a lot of networks showing can you click on "networks" top lefthand area - so we can see all the network information.

post which SSID name is yours, its located in the list, under network "Adapter Name" (1st column)

To post a screen shot of the active window.
1) hold the Alt key and press the PrtScn key. Open the Windows PAINT application (Start> All Programs> Accessories> Paint) and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.
OR
2) if you are using Vista/Windows 7 you can use the "snipping tool" which is found in Start> All programs> Accessories> Snipping Tool

To upload the screen shot to the forum, open the full reply window ("Go Advanced" button) and use the Manage Attachments button to upload it here.
Full details are available here http://library.techguy.org/wiki/TSG_Posting_a_Screenshot

Note:
For a reliable (or robust as the Xirrus user guide says) wireless connection you need a signal of about -70 dBm or better. "A desirable signal level for a robust Wi-Fi connection will be green".
note: the signal level is a negative number, so for example -88 is worst and -40 is better

If you are using the Mac OS then use http://www.istumbler.net/

if you want to optimise base station position and signal strength / dead spots use
http://www.chimoosoft.com/products/apgrapher/ which has a graph function to monitor signal
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TerryNet

Terry
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Mar 23, 2005
Messages
80,777
Also, what firewall or security suite?

TCP/IP stack repair options for use with Vista and 7 and 8.

Start - All Programs - Accessories and right click on Command Prompt, select "Run as Administrator" to open a command prompt. [For Windows 8: <Windows Logo> + x - Command Prompt(Admin)]

Reset WINSOCK entries to installation defaults: netsh winsock reset catalog

Reset IPv4 TCP/IP stack to installation defaults. netsh int ipv4 reset reset.log

Reset IPv6 TCP/IP stack to installation defaults. netsh int ipv6 reset reset.log

Reboot the machine.
 

Soundy

Thread Starter
Joined
Feb 17, 2006
Messages
1,838
All drivers were downloaded from the Lenovo support site. Seems unlikely anyway, as it DID work fine until recently.

Stock Win7 firewall and MSE running (MSE updated and scans come up clear). Resets applied, rebooting now.
 

TerryNet

Terry
Moderator
Joined
Mar 23, 2005
Messages
80,777
If you haven't reinstalled the wireless driver since the problem began, please do so now in case the installed instance is corrupted.

I have observed exactly three things (there are probably more--I just don't know them) that cause symptoms similar to yours ...

a. incorrect or corrupted driver;

b. corrupted (non-Microsoft) security application;

c. slightly corrupted stack/WINSOCK.
 
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