Just to add to the cacophany, since I installed Lion, my 13" MBAir 2010 gets wifi connection errors every time i wake it up from sleeping.  I end up turning off wifi, then turning it back on and that seems to fix it.  Once, I tried the on-board wifi assistance but that asked me for all sorts of usernames and passwords that I've never attached to my wifi access.  Then it got hung up and I ended up just turning the wifi off then on again.

This is definitely a bug in Lion since I use Chrome and the connection errors come up.  Just hope Apple sends an update with a quickness.

john

Did you try the Ping setup?  Samoth Lharts described the procedure for you.  If it's loss of DNS, forcing a continuous data stream works well, as an interim solution until the vendor(s) pull their (collective) fingers out.

After reset SMC in my iMac and 2 hours of usage, the wifi problem seems to be gone..... The people that has de wifi problem may try to reset SMC for test if that resolve his problems.

Yes. Just tried this and it seems to work, to an extent. Big files have a very variable download speed an wi-fi still needs an occasional nudge .. but less so.

I still wonder if updating my router would help - has anyone tried this?

I'm not sure what is worse...the dropping WiFi signal or the many email notifications that refuse to switch off. Grrrr

fallyhag, try this:

http://support.apple.com/kb/ht3964

Thats work for me

This is how to fix it! - seriously until they update it I wouldnt bother with anything else. failing that roll it back 1 o.s because lion's wireless roar is more of a kitten with digestive problems squeek!

this sums up the reset SMC fix

http://www.youtube.com/watch?v=nn2FB1P_Mn8

Worked for me!

Air-man reset SMC has resolved your problem? Good news!

HI William

William Kucharski wrote:

 

I realize how frustrating it is when you're having an issue - I've been there myself - but I also know that since I have no issues with the machines I use nor do hundreds of my co-workers who've also upgraded to Lion and use Wi-Fi daily at work, home and in coffee shops and hotels, there's something unique about your systems that is exacerbating the issue, which is why I've said all along I hope AppleCare is collecting data to be able to track this down and root cause it and direct the appropriate party to fix the issue. That may be Apple - if it's a Mac OS X bug - or a third party if it turns out it's a firmware bug on the part of a router or chipset vendor.

I do understand your comments above, however I have had no reason to even look in this forum for this issue until I upgraded to Lion. My router is the same one that was with this very same iMac when i was running Snow Leopard and using Safari (shipped versions until I moved to Lion) so until I had moved to Lion and 5.1 I didn't have or never saw this issue appear enough for me to log it.

However since upgrading the issue has been enough to cause my Safari to lose connectivity with my router or report no interernet connection or even flip to a local URL path and folder when I hit the reload/refresh browser icon. The problem here seems to be more Safari 5.1 related since I dont seem to get the problem anywhere near as much with Firefox, Opera, Google Chrome or even Camino.

Chris

putnik wrote:

 

Internet radio is more fun  But I seem to remember it finally got solved with a router firmware update after many months. Was it that Safari uses a DNS cache system and the ISP's were seeing it as an attack?

That could be one reason if that is a proven/known cause, was this fixed or updated in all versions of Safari with Snow Leopard (prior to upgrading to Lion?)

What solved it for me was updating the router firmware. Then I got a Belkin N router, for the new wireless 'n' standard. But in turn, this became obsolete as the standard was finalised. What a waste of money!

I now have a new BT Hub 3 router and a very good connection with Lion. I would deduce from this that it is a router problem, but Safari may have also evolved. I am no expert..

PS If the Ping fudge works, at least you will know it is a DNS issue..

Ciao, anche io ho un imac 2009 ma la cosa l'ho superata.

leggi qui: (è in Italiano)

http://support.apple.com/kb/HT3964?viewlocale=it_IT

Mac con processore Intel: reimpostazione del controller di gestione del sistema (SMC)

niente di che si tratta giusto di staccare la spina.

il problema si risolve.

in caso contrario contattami fp75it@yahoo.it

ciao

Flavio

I am also experiencing the problem of unreliable wireless network startup after wake from sleep.  Once the connection is established, there is no issue.

About 50% of the time, the wireless fails to connect.  The bizarre thing is that I can see the name of the network in the pulldown from the Airport symbol, but even if I select that network it does not connect.  Sometimes if I go to "join other network" and "show networks" then pick the network from there, it connects.  Usually I "Turn wi-fi off" then turn it back on and it connects.  In no case am I ever asked for a password (and the network is password protected) so it's finding the password fine.

The really irritating thing about this is that it's a regression to a problem that I had about a year ago after installing one of the patch levels.  A subsequent patch fixed it.

I wish I could figure out what's different with this system; obviously everyone isn't having this problem.  It's the -1 generation of MacBook Pro with nothing fancy.  The wireless network is a Time Capsule.  All Apple.  Firmware is current.  The problem began after upgrading to Lion.