Wireless problem

[J]

On Tue, Jun 15, 2010 at 09:45, madunix <madunix at gmail.com> wrote:
> after I upgraded to 10.04,  wire less network is dead. I can connect
> just with wired is fine. Don't know what to adjust. Never had a
> problem with it until the upgrade

Well, the first, most obvious is:

Double check to see that wi-fi is A: enabled in BIOS (You'd be
surprised) and B: enabled on the machine (most systems have an on/off
switch to turn wifi on and off).

beyond that, who knows.  Your question is too vague.

Wireless doesn't work doesn't tell us anything that can really help.

You might want to check this out:
http://www.catb.org/~esr/faqs/smart-questions.html

Now as for smart questions:

What wireless card do you have?
Do you know what driver you were using BEFORE the upgrade?
Do you know what driver you're using NOW?
Is that driver loaded?
Are you using open source drivers, or are you using drivers from the
restricted repositories?
If you click on System/Administration/Hardware Drivers do you see any
suggested drivers for your wireless device?
If so, is one of them enabled?
Are you sure your router isn't being wonky?
Are you using any sort of wireless security?
Are you entering the correct password to connect to the router?

There's a lot of info beyond "wireless doesn't work" that needs to be
provided.  Those questions should give you a start though.

Cheers,
Jeff