WiFi trouble since Snow Leopard Upgrade

Try another WiFi hotspot.
If it works there, then you know your dorm has a router which needs upgrading.
If it doesn't work there, then you know you might have some configuration issue with your computer.

Yes, ME! And my friends! Ugh--apple please release an update to snow leopard!

If you don't have a solution for bjmankoff, please start a new topic thread here:

http://discussions.apple.com/forum.jspa?forumID=1171&start=0

You'll get a wider audience, and won't confuse bjmankoff with solutions that don't apply to them. Wireless issues can be any of the following*:

http://www.macmaps.com/WIFI1048.html

Trying to isolate 30+ issues with one person is daunting enough. Add extra people who don't have solutions to their own problem is going to just add to the confusion.

- * Links to my pages may give me compensation.

Me too......reset my Airport Extreme today & now I can't get the wifi to connect since Snow Leopard upgrade!!!!

Yoga,
Welcome to Apple Discussions!
I see you didn't read my post I gave someone else.
Please remember to read all the posts in a thread before starting another thread within a thread. There may be tips on how to start your own.

I had a similar problem at a Dr's office. I did research and found if you go into system preferences; network; airport and then remove the automatic and enter another name and then connecting, the wifi started working.

Actually just going into system preferences; network; airport and edit locations. Add a bogus name and delete the "Automatic" location. Connect to wifi and then you can go back in and delete bogus name and add "Automatic" location back in and it works. Must be a bug in SL.

Same happened to me. Since SL, WiFi went beserk. Didn't connect to any spots I had previously. I did the last thing posted here. RT: Actually just going into system preferences; network; airport and edit locations. Add a bogus name and delete the "Automatic" location. Connect to wifi and then you can go back in and delete bogus name and add "Automatic" location back in and it works. Must be a bug in SL.

Make sure your ethernet is disconnected when you do this. Delete the automatic location. Make a name that you want for your dorm wifi. Turn off airport and then turn it back on and then connect to your dorm wifi.

I upgraded to 10.5.8 and for me is completely AirPort unusable. I went back to 10.5.6 to have a connection usable!!!

Same thing for me. The 10.5.8 update is the cause. I found a solution that finally worked for me from another discussion here about the same issue.

Set your router to broadcast the signal in G mode only. This solved my problem and others as well. I think most routers are set to broadcast in mixed, B and G, signals by default.

Ok, I have the fix!! After several frustrating days it finally just works.

The process:
Upgrade your Macs to 10.6 (Snow Leopard)
Powercycle your modem AND time capsule / airport TWICE
Reset your time capsule with a pin or paperclip on the back
Follow the prompts to setup your time capsule / airport access
-- On your Macs
Go to System Preferences > Network > Airport > Advanced > TCP/IP
Click "Renew DHCP Lease" then click "Ok"
Click Apply
Turn off Airport
Turn Airport on

IT WORKS!!!

One of the magical people at tech support walked me through it earlier today. The whole process took about 1.5 hrs because Show Leopard takes about an hour to install on one machine.

Hope this helps-
Joshua