Q: Lion WiFi Connection Problem

Today I called Apple support and they solved the problem. Now my wifi works again with Lion.

All you have to do is erase your Sistem Configuration folder, but call Apple support and they will teach you how to do it.

FINALLY!!

david

Maybe this can help somebody.

I have experienced a combination of the problems discussed in this discussion.

Before installing Lion my MBP was on the original Leopard X from early 2008 when i bought the laptop.

After upgrading to Lion (via Snow Leopard) I immdeiately experienced the problem of lost wi-fi connection after sleep/shut down. I could manually connect to the wifi network (through "Join other networks") but it was somewhat frustrating having to do this manually incl. entering the passcode.

After having tried many of the tips in this discussion (incl. deleting wi-fi profiles, deleting keychain entries, switching channels etc.) i suddenly got a solid connection to the wi-fi and no problems after sleep - just to discover that despite solid and stable connection to the router I had absolutely no access to the internet !!!

I finally reverted to a cabel and conneted this old fasihoned way just to discover, that I now lost Internet connection even via cable if the WiFi was enabled.

Somewhat confused I finally called Apple Support and after about 30 minutes on hold and actually 15 minutes after their end of business hours I got a very quick and helpful guy at the phone.

After less than 5 minutes it appear that he has fixed the issue for me

Looking at the many posts about this issue, I am sure this fix is not the solution for everybody - but maybe you are lucky and it could work for just you - this is what he did:

1. Open System Preferences/ Network Settings

2. Turn WiFi Off and then back On

3. Go into Location/Edit location

4. Create a new Location with the "+" (pick any name i.e. "Test") and select "Done"

5. In the Network window select Apply

6. Check that WiFi is selected in the left side of the Network window (and indicated as connected with green dot)

7. Select "Advanced"

8. Select the tap with TCP/IP

9. In the field below the "Renew DHCP Lease" type/enter: 12  (i.e. the two digits 12)

10. Select "Renew DHCP Lease"

11. Select OK

12. Back in Network Window. I do not recall if I had to select Apply again or just close the window.

I am not sure why this works but the guy explained that he had experienced same problem upgrading to Lion and that this fix worked for him maybe by avoiding mixup between MBP and Router - I don't know but so far I am just happy that it works.

Hope this can help others as well

Installed Lion, can see network, could not connect, times out. Network diagnostics didn't work, tried assistent, chose network, typed my passord and was on internet - even though I got the message wrong password, which it was not.

Concerning the "clean install" solution I posted ... Crud. I spoke too soon ...sorry. The problem took an additional day to rear back up. No solution here.

U guys are all a bunch of closed minded babies, seriously!  Lupunus is100% correct.  It isn't a problem with the OS, it is a problem with the fact that it is now the smartest OS at trying to connect with a Wi-Fi Network. I have just spent the last week trying to troubleshoot this problem. I have thought it was my computer, I performed PRAM, SMC resets, deletedmy config folder, repaired Permissions on HD, deleted Wi-Fi, used AHT disk,everything short of completely wiping out my HD and starting from scratch. Ithen repaired a client’s identical MacBook Pro 7,1 now running Lion and his hadthe exact problem in my Wi-Fi network. After reading all your baby remarks of "it can't be my Wi-Fi, my OS is the only thing which changed, apple just won't admit they screwed up, the OS has glitches"  Your so called years of experience are causing you to have a closed mind.  Open it up to the possibilities.  I also have 10yrs in the IT field.  I got thinking about my network and realized that perhaps it is my network.  My Computer couldn't decide which of my two identically named SSID's to join. I had set one as a b,g network and the other as an N only network. Both with same SSID.  I decided to put Lupunus ideas to work. I noticed that when I try to manually join a network, I see 2 of my SSID which didn't show in Snow Leopard.  I named one differently, added both SSid to my network preferences and decided to let the computer to decide. BOOM, just like that my computer joined the N network, which was actually farther away.  Open your minds to the possibilities that just because youhave 30yrs experience, doesn't mean you know everything.  I'm taking a wild stab in the dark here, none of you work for apple and more importantly don't work for apple in programming their OS.  So there might be things they thought of that perhaps you haven't, or perhaps wouldn't have ever known could exist.  If you still don't believe me, then quit using the best Personal Computer brand out there, go buy a PC running Windows.  I'm sure they "don't" have any problems what so ever.  In case you missed that I said that with sarcasm. Good luck

p.s. if you read this and say, well I still don't have that problem, I only have one wireless router, one SSID, etc, his is different.  Try resetting up your router, apply the latest firmware update to it.  Give it a try, you might be pleasantly surprised.

WEP = the fail

"U guys are all a bunch of closed minded babies, seriously!"

Do you usually start all your converstions like that ? But this is the top:

"p.s. if you read this and say, well I still don't have that problem, I only have one wireless router, one SSID, etc, his is different."

Did you realize that people are coming to this thread after having tried all the proposed solutions ? So, what are you talking about ?

Regarding your solution:

"My Computer couldn't decide which of my two identically named SSID's to join."

This is exactly the problem, it is not your computer, it is your software, which is OSX Lion, your so called 10 years of experience need some more years on terms learning. But supposing this worked for you (not for me), based on your solution I wonder how can you still say that the problem is not in how the OS works. When in your house you have lot of machine working fine and one that suddenly stop working after an upgrade, well, it is hard to think that the all the world is wrong and Lion is fine.

The problem I was having was my MacBook Air would randomly disconnect from the router when I tried to reconnect it would give me "time out" messages and then "wrong password" I can assure you it was not the wrong password !

The solution which I found on one of the many threads was to set the router to b/g mode only and not use "n" the thing now connects without dropouts

This is wonderful all I need to do is send an email to all my clients to let them know they have to reconfigure their routers to be compatible with my Mac

In the highly probable even they tell me to get lost I will have to go back to using my PC laptop which connects every time to every router in all modes

Happens everytime there is an update. Have a look here. Sound familiar?

https://discussions.apple.com/thread/2138705?start=0&tstart=0

Every router's set up is different and resetting may work for some, renewing DHCP Lease works for others while sometimes nothing seems to work for others. It can be anything from messed up settings to your IP not being ready to handle the new system.

So nobody should be telling anyone how childish they are just because one thing worked for a couple of people. I, like most, had a clean change over, but I did just update my modem before hand.

Good Luck

Tried it. Wasn't pleasantly surprised

Ok, I'm no expert but if everything worked fine before upgrading to Lion wouldn't you think that might be the problem? I am not willing to waste my time screwing around with all these "fixes". I paid my money, I want an OS that works! Now the only way I can get wifi is to boot to Windows 7. Something I have only done a couple of times up until now to use some old software which I have now replaced. Not impressed with this Apple! Looking at the sheer volume of threads and posts on the Lion/wifi issue, don't you think it's about time something was done???

For the few improvements Lion offers this has been the worst upgrade decision I have ever made.

Did I mention I want my money back? No? I WANT MY MONEY BACK!!!

Have you called Apple support to see what they can do to assist you?  I am amazed at how many people have not done this.  This is NOT the world of windows where microsoft provided no support and user communities were the only place to find work arounds (not fixes).  This is Apple's world.  They charge you for support so that they can pay someone to be ready to help you.  They don't sell junk (in Steve Job's words), and so they do expect that their products are working.  If they are not, and you are not telling them about it, then you are pretty much deserving of the frustration you are getting.  Demanding that somehow they can devine that you have a problem and know how to fix it out of thin air, is just ludicrous. 

Please people, report every issue you have with something not working on your Mac by calling Apple support, or getting a Genius Bar slot, and taking your problem to the people at an Apple store.  This is a vastly different experience than what happens with a Windows computer.

Just do it, and you find that they will be able to solve your problem much faster.

After talking to a friend who is a Apple certifed tech he said that this issue is mostly due to lion itself and not the computers and he said there wasn't a conclusive fix yet just a few small workarounds that may or may not work.

He said Apple is aware of the issue but no fix has been announced yet.

I stopped using my WIFI connection until this is fixed wired connection is faster anyway if you have a desktop computer use it.

Hopfully this will be solved soon

Okay, so this, more than anything means that people need to be calling Apple support and documenting their problem, so that all the known "work-arounds" can be tried, and new information gatherered which can point at the real problem.

I, still personally am voting for a code fix that involves ignoring intermitent reports from the wifi radio subsystem, about loss of net.  I think that certain classes of network interference are creating patterns of RFI and failure in certain drivers which, if ignored, or at least tollerated, would result in wifi traffic flowing, but perhaps at a reduced rate.

It just seems to me that the drivers are restarting the radios, or at least forcing a resync which is not able to "finish" in the alloted time, and so it goes on and on and on trying to get to a "clean" state, which there is just too much interferring noise from other 2.4ghz radios.

If switching channels has fixed your problem, or lenghtened the time that things have worked between drop outs, then that, for me, supports my argument.

Please call Apple support and let them have your issue on the list to help them understand how many people are affected, and how much effort they need to put into resolving this.

If you haven't seen what has happened to some customers who had problems, go watch this video of Steve Jobs, himself doing customer support.

http://www.cnn.com/2011/11/22/tech/innovation/jobs-excerpt-customer-service/inde x.html