Lion - Wi-Fi doesn't automatically reconnect when reawakening after sleep

The Problem is this, in your system preferences, under network tab, under the advanced tab, your various networks are remembered. If you make a change to your network, well guess what it is still remembering your older network, so now you connect ot the adjusted network and now the computer is remembering two networks from the same place. Also you could put a check mark in the box that says Show wifi status in menu bar. There is nothing wrong with 10.7.3, and suggest that you give it a try.

Did all that with an apple tech and it did not fix it

The only thing that worked was going back to 10.7.2

you dont need an apple tech to do that.. you can do what i just suggested by your self.

Doesn't explain why it only happens when waking from a mouse or keyboard click, and not when it wakes using the start button

This one helped me, now swift re-connection.

System Preferences > Network >Advanced

click the TCP/IP tab.

Set Configure IPv4 set to "Using DHCP" (probably already your default)

Set Configure IPv6 set to "Link-local only" (this one did the trick)

Click on the "Renew DHCP Lease" button.

Click on "OK"

I'm sure you can speak knowledgeably for everyone, but if what you say was true (and that solution has been posted several times), this thread wouldn't be so long and so frequently updated.

That fact is, despite your suggestion many people are still experiencing this problem, including myself, and it just isn't that simple for everyone. Judging by people's feedback, different fixes work for different people.

When you've just spent well over a $1000 on a product, it doesn't really seem acceptable to have such problems continually.

None of that works, have a look around for people with the same issues, 10.7.3 causes problems coming out of sleep for some, not all but some Macs. If I bring my iMac out of sleep using the power button (gentle tap) all is fine, use the keyboard and it does not work, all network settings are as they should be. This was on a clean install with the new combo thats on software update as well, all 1.34GB of it. 10.7.2 and before no issues, 10.7.3 and nothing, so if its as simple as you say why does pressing the iMacs power button make it work coming out of sleep? Please just accept that for some Macs and it seems the later ones like mine with the triple aerial configuration for 450Mbps it causes this issue. Hopefully this will be sorted soon.

this thread is not that long... I have seen threads in the 1000s of pages. You might want to create a location also in your system preferences, network tab also.

Honestly this has all been tried 😟 if I reboot my router when the iMac is asleep it will grab the network when coming out of sleep using the mouse or keyboard, but after that same issues of not connecting to the network happen again.

maybe your batteries need replacing soon in your keybord.

i didnt mention anything about rebooting a router? Did I?

I own a Mac Book Pro and an iMac with wireless keybord and mouse (and planning to get a track pad) I think you are getting bluetooth confused with wifi.

I was explaining that if I reboot the router the iMac notices the network just once then the same behaviour starts again. I mentioned my keyboard because this is a well known issue, using the keyboard (98% battery) brings the iMac out of sleep but waking the iMac this way results in no wifi connection, using the power button on the iMac to bring it out of sleep does and its not anything to do with batteries. I know the difference between wifi and bluetooth, you just don't seem to be able to problem solve, and have a rather repetative mantra of '10.7.3 is fine and everyone else must be wrong' going on it appears. Sadly the philosopy that Apple can do no wrong does not help people with problems, and you certainly are not helping at this juncture.

Pelle,

I used this solution as well. I got it from an Apple rep. It worked 6 times yesterday morning, but did not work later in the day. (That is, the system reconnected to wifi when being wakened with the mouse or keyboard.)

Please let us know if it continues to work for you.

Thanks.

I just ran the Extended hardware test, and the result was "no trouble found."

I do still find that the system will automatically reconnect to wifi with restart, or when awakened with a touch on the power button. But not with a mouse click.

I wonder if we have a problem that only shows up with certain versions of the hardware. There are a lot of distinct components in an iMac. I would think that they are not all identically the same as time goes on. One might speculate that perhaps some versions of the hardware that does the wi-fi connection work differently from others. Just a speculation.