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Stupid laptop wifi woes

post #1 of 5
Thread Starter 
I have an HP laptop with an Atheros AR5007 wifi chipset. I request a specific ip address from wifi(192.168.1.195) so I can have port forwarding to the laptop.

When I specify an address, no other devices are able to grab an address from DHCP(ZuneHD, dad's laptop) but other devices that were connected before the laptop keep functioning properly(including this laptop).

I tried changing drivers and stuff, resetting all the settings but it doesn't help. When I speficy an address on my dad's laptop it will connect fine even though it couldn't get one from DHCP(pinpointing it to a DHCP request failure). If I try to connect my laptop to the wifi and grab an address from DHCP while my dad specifies an address, it works fine.

So it seems to be specific to this card. I'm using driver version 7.6.0.114(2008). I don't think there are any newer versions available.

I have a DIR-615 router. This issue is present on a Netgear WNDR3300 with stock firmware, and DD-WRT firmware also when I connect this laptop to it. So I don't think it's a problem with the router.

It's funny when I go to the airport or starbucks because my computer prevents anyone else from getting on the wifi

tl;dr - laptop connects to router, devices can't grab a DHCP address. disconnect laptop, everything normal again.
Edited by tehlolzor - 12/29/10 at 4:56pm
post #2 of 5
Does your laptop work anywhere else? like at your friend/neighbor's house. You do have an odd situation
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post #3 of 5
You might want to try getting on ebay and getting a new internal wireless card for your laptop. You can get em for cheap and they are cake to install.
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post #4 of 5
Can you try these alternatives before removing your wireless card.

1) Do a clean install of windows / or boot another HDD with clean windows install and try the wireless card and see what happens

OR

1a) Boot a linux distro which supports that wireless card - probably Ubuntu (Just boot off the CD and see what happens...if you can get the card up and connected...then that is a good test).

And

2) You need to connect to someone's wireless router - neighbour/friend etc. And make sure that network has DHCP and see if your laptop can pull data.

3) Post the results here.

These alternatives seems like lot of work, but this will provide you with the best indication either your card is bad, or card's drivers/settings/ or something with windows is hosed up.

Right now, the key is to see if the alternatives work and isolate the problem.

Please let me know if my post helps you out.

Thanks,

sarien
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post #5 of 5
This sounds so close to a problem I have seen at work now 3 times. The only difference is no one is able to use the wireless network when one specific laptop is turned on. It does not make a difference if they are static or DHCP.

The wireless card in these three laptops went bad. I know you can't do this, but I verified it by using a spectrum analyzer. The NICs in these three laptops would use 100%duty cycle of the channel they were being used on, which actually turned the laptops into interference. This would not allow any other wireless device to work on the same floor of one building. This also knocked all wireless devices off line in a 100 foot radius of the laptop in a warehouse one other time.

We have several thousand wireless devices, and this has only happned 3 times over the last 3 or so years so it isn't very common.
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