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After Lion upgrade, having network issues after wake from sleep

After upgrading to Lion from 10.6.8 on my MacBook Pro (15-inch, Early 2011), I am unable to connect to the Internet after the computer wakes from sleep. I should rephrase this - I am able to ping IP's and DNS (DNS servers are present) however none of my apps will connect (Safari, iChat, etc) -> they all indicate the Internet is unavailable. I have two Airport Express's running 7.5.2 extending a WiFi network off an Airport Extreme running 7.5.2. This issue is specific to waking from sleep. Any thoughts or suggestions would be appriciated.

Mac OS X (10.7)

Posted on Jul 20, 2011 8:31 PM

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213 replies

Jul 24, 2011 11:46 AM in response to jbcoster

Definately not related to DHCP or Airport or Ethernet or time machine or your internet or clean installs. Trust me I've experienced this independent of any of those. The issue is reminicent of something you could get with viscocity vpn on SL, where certain apps would fail to resolve hostnames, whereas anything from terminal (i.e. ping) would work fine. There i know for a fact that it was an issue with the DNS subsystem and this seems to be very similar (though no 3rd party app is to blame here). Definately looks like a bug in the OS if i've ever seen one. And I've only had it after waking from sleep so far.


My workaround is to shutdown instead of sleeping until apple fixes this. Since lion saves all your windows etc. this is just really annoying. Hope this gets fixed soon.


Early 2009 13" MBP here btw.

Jul 24, 2011 5:47 PM in response to k0

I too was having this problem. After reading the console logs I noticed quite a few Little Snitch errors. Little Snitch was broken, the version was incompatible with Lion. I updated Little Snitch and now my WiFi is working after waking from sleep. I have tried it three times now after it always failing to connect before the update of LS.

Hopefully this helps someone else.

After Lion upgrade, having network issues after wake from sleep

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