Windows 7: Wireless card Problem

Hello! I have a problem with my wireless internet card (Qualcomm Atheros Ar9485). It has trouble connecting to websites. Speed and ping is fine, but it is the connecting that often fails. I have done tests on my other computer and on my iPad, and everything works fine. I know that there is something wrong with the wifi card, because when i plug in my ethernet cable, everything works fine. My wifi drivers are up to date. I can still browse the web wirelessly, but, 30-60% of the time, the connecting fails.

I have had this kind of issue before,(All browser slow/not loading pages), and i got the problem solved by switching wifi channels. This won't solve it on my (new) current pc.



What can I do?

Also, when I'm trying to play Minecraft Online it's impossible to play wirelessly(cant connect:Timeout), but it's working by cable (although wireless is working when i'm hosting a server and connecting to localhost).

Hi Kenan97, have you checked that the MTU (Maximum Transfer Unit) is OK.
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To see your present MTU. (Maximum Transfer Units).
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Open a command prompt, by typing cmd in the start menu search box, then type:-
netsh interface ipv4 show subinterfaces
then press enter.
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To find your optimum MTU.
Most common are 1392/1400/1432/1492 (1432 is the recommended MTU for Talk Talk but may not work for all).
You can try these ones, or you can diagnose the exact figure yourself as below. Or ask your ISP.
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First, log into your router and set MTU to 1500, just for testing purposes.
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Open a command prompt, as above. In the cmd window type:-
ping -f -l 1472 google.co.uk
(the l is a lower case L, and there are spaces after ping, f, l, and 1472)
You may get something like "packet needs to fragment but 'DF set', or 100% packet loss, or 'request timed out'.
If you do, try again, reducing the value of 1472 by small increments until you find the largest number
which works with no lost packets. Then add 28 to this number. Now reset the MTU in your router.
EG: max value with no packet loss = 1464 + 28 = optimum MTU of 1492.
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To change the MTU value in your computer.
Open a command prompt (cmd) right click, and 'Run as administrator', type:- ipconfig/all
Make a note of the exact names of the network devices.
They are the words directly after “adapter". Eg: “Local Area Connection" or "Wireless Network Connection".

Now use one of the following commands to set the MTU value:-

netsh interface ipv4 set subinterface "Wireless Network Connection" mtu=1432 store=persistent
or
netsh interface ipv4 set subinterface "Local Area Connection" mtu=1432 store=persistent

Change 1432 to your previously found result.

Thanks for the reply!Whatever value I set when testing, It timeouts or gets the packet fragment error(only big numbers). Am I doing something wrong?

YES! you will find the answer faster by asking your ISP for correct MTU to be set in your router.

Hello! Sorry for reviving the thread, but now I have problems connecting to servers in minecraft. I have forwarded the port for minecraft servers (25565), but everytime I want to connect to a server it time-outs. What can I do? I can connect to all servers from my other pc so it's not a router problem, it's in my pc.

People cannot connect to your server are you using DHCP or have you assigned a fixed(static) ip address to the computer hosting the minecraft server?

People can connect to My server,but I can't connect to theirs. I'm using a fixed ip. The problem is I can't connect to working servers.Incoming connections to My server are working perfectly.

What firewallare you using and try as a test disabling it and see if you can then connect after test re-enable the firewall and let us know the results.

I've tried disabling both the router and security s/w firewall several times, none of them worked. I'm using f-secure.