Mountain Lion no Wifi after wake from sleep

I meant to add - look in the file /var/log/system.log and search for this line to see what country's your machines are picking up:

system.log:Nov 9 11:36:57 GarysMacBook kernel[0]: en0: 802.11d country code set to 'GB'.

Rgds

Gary

Odd that my reply and your recent replies aren't here? Another possibility: the wifi/bluetooth boards in your Mac Mini and your MacBook Air are different?

I have a MacBook 2008 vintage and had no problems with Lion and have latest ML 18.2.x since installing and getting worse when I shutdown all was ok on login next time but shutdowns are becoming like sleep when the macbook awakens it does not see the wifi network. I must restart the computer and then I am connected. Turning off and on wifi does not work. I did notice a drop down java notice occassionally when not connected that it can't find something. Apple where are you??? Too much partying and stock bonuses - everyone is out to lunch. fix this stupid issue.

OK, I have the late 2010 MBA... have packet loss after sleep/awake.

I have a fix... I have to MANUALLY set it to sleep on the menu. Not letting it sleep by the energy setting timeout.

If I manually put it to sleep, it wakes up working.

If I walk away long enough and it kick into sleep mode. it wakes up having 50+% packet loss.

repeated this and confirmed it works for me.

Hope this help.

I forgot to mention that I have 10.8.2 OSX and when there is packet loss... the work around is either restart or manually set it to sleep and then wake it.

Something is not working right on the time-triggered sleep. Hope apple fix it soon.

How do you confirm packet loss? I have a late 2010 Air also...

What I see on my end is that it appears "connected" at the icon, yet there's no connection online.

In any case, it'd be impractical for me to set the MBA to sleep manually, as I carry it around my work continually. And aside from sleep, it also appears that I have this issue when I hop between access points, even when not in sleep.

And as this happens at work, I can't ask them to upgrade the thousands of access points throughout the facility just for a problem with a BYOD MBA.

When I say packet loss... I open up the terminal app and do a PING yahoo.com.

When there is network issue, the ping will give timeout.

When there is timeout issue, I just manually put the lappy to sleep (using the menu>sleep) and wait for 5s and wake it. It will be all fine.

Very repeatable, and very time consuming to do this 20 times a day when a client or the boss is right next to me. I hope someone at Apple actually see my bug report and working on a fix.

Macbook Air (1.6 Ghz, i5), 10.8.2

I also had wake-from-sleep issue: endless rainbow cursor spin and restart required.

Turning off bluetooth before sleep appears to fix the problem: perhaps related to:

http://blog.avatron.com/post/28135386805/kernel-panics-mountain-lion-and-bluetoo th

Is there a fix yet?

Just upgraded. Rather annoying.

It's December 1, 2012 and this issue persists. Will it ever get fixed?

I bought a Mac because it looks pretty, but mainly becasue of the buggy Vista. Now becasue of Lion and MLion I am back on Windows. Here my solution, install bootcamp and use Windows until Apple decide (if ever) to fix this issue. I have been suffering from it since Lion, Mountain only make it worst... lame Apple...

My bluetooth normally remains off, yet I still have this issue at work. (Home is fine, BTW).

Found this link recently:

http://reviews.cnet.com/8301-13727_7-57557838-263/one-way-to-tackle-captive-netw ork-connection-errors-in-os-x/

I'm wondering if a certificate issue is causing my problems at work - though my connection is intermittent, not continuous as you'd think a certificate issue would be. However, this article is describing what I'm seeing - "full bars", no connection.

Then try using another DNS server like either OpenDNS or Google Public DNS to see if that helps.

Another thing for your situation is try to open /Applications/Utilities/Keychain Access and delete the certification cetificate for the iwrlesss. Then rejoin the wirreless network and add it back to your Keychain, fresh. This also might help.

Two points:

1) not sure how another DNS server would help, especially since I'm trying to access applications on the corporate system's intranet (e.g. Citrix).

2) pinging 8.8.8.8 works, with no packet loss. Applications (even Safari) don't load consistently. And where I am in the building matters. Some areas work, some don't.

I'm thinking it's something to do with access point security somehow.

Here are some screenshots of what I'm seeing. I tried doing network diagnostics when connected like this, but was told I was not connected to the network.

"Another thing for your situation is try to open /Applications/Utilities/Keychain Access and delete the certification cetificate for the iwrlesss. Then rejoin the wirreless network and add it back to your Keychain, fresh. This also might help."

Nope, did that. The system asked for the certificates again (and I clicked "Always Allow" for them). Still get "full-bar dead zones". Somehow, this was never a problem with my Air under Snow Leopard.

Of course, the big reason I upgraded in the first place was to get whole-disk coverage for FileVault, rather than getting a third-party app... now I might wind up switching to a facility-supported Win7 setup instead.