After Lion upgrade, having network issues after wake from sleep

William Kucharski wrote:

[...]

Have people noticed a difference between lid sleeps for portables, system timeout sleeps or "Sleep" Apple menu sleeps?

I've noticed that this issue occurs only with lid sleeps on my MacBook, but so far does not seem to occur with system timeout sleeps. To the point others have raised about Time Machine, I have a Time Capsule that backs up wirelessly, and it does not seem to make any difference whether a backup is in progress or not when the lid is closed.

I seem to have the same trouble as listed here in this thread. It seems to happen each and every time I wake up the computer after it's been sleeping for a period of time. (Not sure but usually more than 15 minutes). I have found a reliable work around that seems to solve this each time. I use a static IP address on my home LAN and I have presently two network Locations stored. (The only difference between the two is the DNS they use[OpenDNS -vs- Google DNS]).

When I wake the machine up and I can't access the internet from my apps (Mail,Safari etc etc etc. but yet I can ping to addresses such as www.apple.com) I merely switch from one Network Location to the other then immediately switch back to the original configuration all problems go away.

It's nothing more than a hassle at this point and I would hope it gets fixed soon.

I welcome if anyone at Apple needs any kind of data dump to help isolate this. Please contact me.

~e

Hardware Overview:

Model Name: Mac Pro

Model Identifier: MacPro2,1

Processor Name: Quad-Core Intel Xeon

Processor Speed: 3 GHz

Number of Processors: 2

Total Number of Cores: 8

L2 Cache (per Processor): 8 MB

Memory: 8 GB

Bus Speed: 1.33 GHz

Boot ROM Version: MP21.007F.B06

SMC Version (system): 1.15f3

Serial Number (system): 1571519SUPZ

Hardware UUID: 00000000-0000-1000-8000-0019E3F8973E

System Software Overview:

System Version: Mac OS X 10.7 (11A511)

Kernel Version: Darwin 11.0.0

Boot Volume: Bay3

Boot Mode: Normal

Computer Name: Eric’s Mac Pro

User Name: Eric Goodrich (eric)

Secure Virtual Memory: Enabled

64-bit Kernel and Extensions: No

Time since boot: 1 day14:48

That seems like a different symptom, as that's not "not having a connection to the Internet," but rather that DNS resolution isn't occurring properly (and why at least one person saw their problem go away with the installation of an old version of mDNSResponder.)

It seems DNS resolution is a sticking point for every release, as there were quite a few DNS issues Snow Leopard as well.

Just chiming in to correct myself that the issue now seems to be occurring with system timeout sleeps on my machine as well.

Makes sense to me that it's a DNS resolution issue - I read on another forum that someone had worked around the issue by changing their DNS server to the Google Public DNS. Definitely would be nice to get a fix soon.

Perhaps my issue isn't the same as everyone else's, but I don't think it has anything to do with DNS. When opening up my MacBook the WiFi icon is greyed out, indicating the the wifi adapter isn't even connected to a network, so even if there were a DNS issue, it wouldn't make any difference.

You can try to force it to connect to a particular wifi network, but it doesn't matter, the OS doesn't even make an attempt to connect.

Whenever I've encountered this issue, the Time Machine icon would be active. It seems like the OS is waiting for something to finish, once it's finishes then it allows the WiFi adapter to connect to a network.

Next time I manage to reproduce it, I'll check the actual statuses of the network interfaces.

Hi Everyone, I'm a noob to the support community becasue I've never needed to use these forums. Until now.

I upgraded my iMac 21" early 2010 to Lion on the day of release.

Since then I have found my wifi "is not connected" when the iMac awakens from sleep.

It makes no odds how long I give it to wake up.

The airport icon is fully lit and my network shows as being connected.

Originally I thought it may be something to do with my Airport Extreme, until I noticed that my Daughter using a MB Pro with Snow Leopard was not having issues.

So, in order to do anything with Safari, I have to run the network diagnostics which instantly flicks over to 6 green lights and tells me that I'm connected.

After this, the wifi works with no problems - until the iMac next goes to sleep...

Stew PA wrote:

So, in order to do anything with Safari, I have to run the network diagnostics which instantly flicks over to 6 green lights and tells me that I'm connected.

After this, the wifi works with no problems - until the iMac next goes to sleep...

Hi Stew, as you can see it's very common since Lion.

You can file a feedback to Apple, I think this could help (but I'm sure they are working on it...)

By now, you don't need to do all the network diagnostic, just switch the wifi off/on or change the location network (I'm not sure about the name, I'm suing Lion in italiana and it's called "posizione").

If you don't have any location menu under the "apple" menu, you can create one or more at System Preferences, Network, Change Network Location (again: should be something like that, in italian it's "Modifica posizioni"), and duplicate one or more.

Hope this helps, at least until Apple fix this...

A point of clarification, I did not mean to imply that this is any form of a DNS issue. The fix outlined above is resolved by switching from one network configuration profile to another. Switching from one configuration to another seems to provide a little coaxing for the OS to behave. 😉

~e

William Kucharski wrote:

Unfortunately it's not readily reproducible on just any system; I know I and several others have tried without success, so the more information on affected systems and exact methodology to reproduce the issue is good.

Few problems are, too many variables.

One variable I am wondering about in this case, is what wifi card is being used by each of the people having problems.

I have seen Broadcom cards in many of the logs I have looked over.

I too have a Broadcom card.

I wonder if this is simply a kernel extension problem that relates to this particular Broadcom card?

Anyone care to offer their wifi card specs?

Note that most Apple products use Broadcom Wi-Fi chips at present, and few of them have this particular issue.

Note also that in trying to narrow this down we've got multiple issues here:

• Upon wake, the machine does not reassociate properly with the Wi-Fi access point
• Upon wake, network connectivity is present, but DNS service fails, causing a "no Internet" message

William Kucharski wrote:

Note that most Apple products use Broadcom Wi-Fi chips at present, and few of them have this particular issue.

Note also that in trying to narrow this down we've got multiple issues here:

• Upon wake, the machine does not reassociate properly with the Wi-Fi access point
• Upon wake, network connectivity is present, but DNS service fails, causing a "no Internet" message

My issue appears to be the latter comment, related to DNS. I'll have to check my settings the next time it happens and see if there are DNS server numbers present under the network preferences. Or are there DNS servers listed and they are not being resloved?

I was actually thinking of specific Broadcom cards but I am not at home and tgherefore can not check what specific model it is. This is a late 2006 iMac however.

I've actually seen it once or twice when upon waking DNS resolution was not occurring properly, but after about five or six seconds, things started working normally without needing to take any of the shut the interface off and turn it back on actions others have had to - nothing big but certainly an indication that there's something going on there.

I have the same issue. Every time I wake my spring 2011 MBP from sleep, I have to manually connect to my Airport Extreme. The computer will not automatically do so. I never had this problem prior to upgrading to Lion.

My system information reports:

Interfaces:

en1:

Card Type: AirPort Extreme (0x168C, 0x8F)

Firmware Version: Atheros 9280: 4.0.55.4-P2P

What's really bizarre now, is that it hasn't done it since I posted on here yesterday!

The scary things is when you search for similar issues you get pages and pages of threads:

https://discussions.apple.com/search.jspa?peopleEnabled=true&userID=&containerTy pe=&container=&spotlight=true&q=network+not+working+after+sleep

That was just using the search words: network not working after sleep

If you alter the search words to more or less and different words then you end up finding even more threads about the same subject. This is bad. Gone from frustrated to really unhappy ... and now have committed to putting Snow LEopard back on my machine but destroying all settings and starting afresh to see if that fixes anything. Like I really have time to spare to do that ... 😟