Q: Mountain Lion no Wifi after wake from sleep

New update:

Over night I closed the lid to test if it was a forced sleep issue (closing lid or pushing button) vs. natural sleep and it does not seem to be the case. Waking my Macbook by opening the lid the wifi connection was fine. The only difference I had this time from every other time was I did not have a USB device connected. In the past I would either have a Time Machine drive or my phone connected via USB when the computer went to sleep, and when waking up I would have the same problems as everyone else.

So test two will be erconnecting my Time Machine drive (via USB) and putting my computer to sleep by closing the lid before going to work. If it results in the Wifi freezing then we may be on to something.

Will update.

I am having the same problem with my mid-2011 MBP - beach ball freeze during wifi network scan after sleep - have to reboot - running dropbox, transmit, google drive. I quit all of these. Deleted and replaced my wifi connections - not yet sure if it has worked. Not using Time Machine, or Parallels. The only login item I had in common was iTunesHelper. Upgraded to Mtn Lion last night and immediately began having the problem. Installed little snitch 3 right after updating to ML (but I thought that had been ruled out). I will keep following thread and report any changes. - musenut

Okay, after a full day of testing, it looks like my issue is with bluetooth. Turning this off before sleep fixes the crash for me. I first found out about a similar issue here, if you wish to do more reading:

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

The only other things that cures this is turning off wifi before sleep or turning off hard disk sleep in the Energy Saver preferences. Neither are good solutions, but without a bug patch, I am choosing the lesser of two evils.

I am still very curious to see if DropBox or Growl has anything to do with it. If anyone has any luck turning these off and fixing their sleep issue with that, please let us know!

I actually tried turning off Bluetooth last night and this AM I hung up when I woke it up.

I deleted my known networks and created a new one. Now I am not gettng the freeze but I am prompted every time to choose my preferred network. It won't remember what my preferred network is even after restart .. but it isn't freezing

Ok no freeze after testing my second guess. The only other thing I have done is removed all devices from the bluetooth menu and then turned of bluetooth, so now I'm linking it might have something to due with how using bluetooth to awake the computer.

Either way I now believe its tied to the bluetooth.

I'm not totally convinced of that, as when I did my clean install and only installed iLife over it, my Bluetooth magic mouse which was already tied to the hardware (stayed paired) had no effect on a freeze, since I did not have any freezes.

One last question for the group. Do any of you have a password on wake from sleep? Or auto login, no password on wake from sleep? I do on my normal install, but did not on my crash free install. Curious.

I do not use a password to wake from sleep and I am not using bluetooth at all. No peripherals (were stirring) - not even a mouse

I disabled my "Require login after 15 Minnutes" and turned off bluetooth before going to bed...and this AM I didnt crash. Interesting.

Meh.. nevermind. Let it sleep for about 1/2 hour and woke it up to another crash that required a hard reboot.

Everyone be sure to go to the page below and report this issue to Apple. Be sure to link to this thread as well.

http://www.apple.com/feedback/macosx.html

It took me a few days to resolve this issue, and this forum disucssion (among several others) proved quite helpful, so thank you all.

For me, it was an application conflict. My favorite FTP program (Transmit, by Panic) puts a very useful item in the menu bar. Removing that from login items (preferences > uncheck show in menu bar + log out/in) took care of the horrible crash on wake as my laptop tried to reacquire the wireless network. Note, Mail & Safari are pretty much always open...

So for me it wasn't Dropbox (I updated, but nothing got better), it wasn't the plist files in ~Library/Preferences/SystenConfiguration, it wan't Parallels, it wasn't Time Machine, it wasn't IPv6 network settings. It was Transmit causing the issue (no update since ML release...)

On wake the wifi menu item would scan, and if I clicked on it or tried to open Network Preferences I would get a crash, every single time.

I deactivated anything that was not Apple & had a network/internet arm. When I got to Transmit every symptom cleared up; my internet browsing got significantly faster (Safari page load times, etc.), and the computer itself (mid-2009 MBPro, 2.8 C2D, 8GB RAM) got noticably faster, smoother, etc.

Deleting all known wifi networks solved it for me. Thats all. And I'm still running: Parallels 7, Transmit, .. etc on a Macbook Pro Retina.

I ve tested short sleep, deep sleep (over night) and it do not freeze anymore.

best
Jesper

As noob as this may sound, I noticed that, prior to an impending restart due to the "wake from sleep wifi hang" when I moused over the first few items in my menu bar all was fine wioth cursor. When I moused over Transmit icon in menu bar- rainbow ball. Will remove and keep trying.

Within moments of my reply to the post, amazingly I recevied this update notice:

Transmit 4.1.9 fixes an issue with the Transmit Disk menu, another issue with Keychain Access troubles under Mac OS X 10.6, and updates Growl yet again.

My grandma always said "bit dog always barks".

Removing known networks and re-adding seems to have fixed my dropped connections issue.  Time will tell.