Ethernet fails to connect after waking

After installing 10.4.11 on my Intel Mac-Mini, Ethernet fails after waking from sleep. The ISP, Network, and Server lights in Network Diagnostics are Red. The Built-In Ethernet and Network Settings are Green.
I used to have a static IP and gave up to DHCP thinking it was a DNS problem. To my surprise, when I woke the machine set to DHCP, I still had the same problem. My PPC seems unaffected so I don't think it's a router problem.

I think that was the Delta, Mac OS X 10.4.11 Update (Intel), 183MB...
http://support.apple.com/downloads/MacOS_X_10_4_11_Update__Intel
Yep, started D/L & it's called... MacOSXUpd10.4.11Intel.dmg
Mac OS X 10.4.11 Combo Update (Intel), 321.5 MB...
http://support.apple.com/downloads/MacOS_X_10_4_11_Combo_Update__Intel
Seems strange that I'm the only one with the problem, but the culprit definitely appears to be the update.
The scant evidence in the past when this happens has pointed to marginal Hardware that the Updates pushed a little bit too much harder, or used the HW differently.

Similar Messages

Ethernet slow to connect after waking from sleep

Since installing Lion (and updating to 10.7.1) on my 2008 24" iMac I have noticed that after waking from sleep the internet connection takes about 10 seconds to restore. I have reset the SMC and PRAM and performed a safe boot (in case this helped) but to no avail. The slow conenction can be observed if after waking from sleep the Network System Preference is clicked and the ethernet status "light" is red, changes briefly to amber and then green indcating a connection. The iMac is connected via an ethernet cable to a Linksys 802.11n 4 port wireless router.
I also have a 2010 13" MacBook Pro, with the same OS, and version, conencted in the same way to the same Linksys router and it does not exhibit this problem.
This slow internet connection access after waking from sleep is an annoyance and I'd appreciate any input on how to elimnate it.
Thanks to those wiser than I, who might read this note.

SOLUTION FOUND!
I've found a list of possible solutions here's the link:
http://osxdaily.com/2011/07/22/wifi-dropping-in-os-x-lion-fixes/
I solved my problem moving the Ethernet and WiFi adapters in the top of the list and Bluetooth at the end.
Move Wi-Fi to the top of the Service Order list – This is an old tip that simply prioritizes WiFi as the primary method that your Mac should connect to the internet, and it seems to help maintain connections

IMac loses WiFi connection after waking from sleep on OSX 10.8.2

Bought a new mid-2011 21.5 inch IMac this week. It is not re-establishing WiFi connection after waking from sleep. Was happening on OSX 10.7 that it came with, so updated to 10.8.2 and same problem exists.
I am running a mid 2012 MacBook Pro with Retina Display alongside, on OSX 10.8.2 and no problems at all. Cannot work out what is causing the IMac to fail and neither can Apple!
Could it be the Netgear Wireless Router 3 years old? Full signal strength!

Me too!
I am on a MAC Pro desktop and I am having the same issues. I go to system preferences and just click the network icon. Then I close mail and when it opens it now sees the network. This is getting very annnoying.

Network connection after waking from sleep

Hi... More or less any time I allow my MacBook Pro to go to sleep, when I wake it up I am nearly always disconnected from my Airport connection (I connect to a NetGear wireless router via my internal Airport card). I go up to the menu bar and click on the now grey airport icon and I do still see my network in the list of available networks. I click on it, after several seconds a message comes up that says "there was an error joining the Airport network "network name""... But I then simply click on OK (rather than Try Again, I've learned that by trial and error) and the network reconnects just fine... Then when I let the machine sleep again at some later time, I do that all again... Any suggestions of what might be going on??? I do have "Use Interference Robustness" turned on (not that I know why exactly) but I've also had it off before and that seems not to matter... Any suggestions??? thanks... bob..
FW800 G4 dual 1.25 Ghz and 17 inch MacBook Pro Mac OS X (10.4.8)

I have "join preferred networks" selected, and mine os the only one on the list, and it still does not connect after waking from sleep. It is WEP security, not WPA2. I checked out the following article, but it was of no help:
http://docs.info.apple.com/article.html?artnum=304482

My iPad loses connection after waking away from router even in the next room over.

I know it's just my iPad, as when other people with iPads are here (or even just with my iPhone), they still have their connection and mine is lost. Or when I go places, people will have their connection pretty far away from their router and my connection is lost. I have rebooted the iPad and nothing. My iPad screen cracked previously so I took it someplace to get it fixed, so I don't know if that has anything to deal with it? Help please!?

Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
    •    Launch Settings app
    •    Tap on Wi-Fi
    •    Tap on the blue arrow of the Wi-Fi network that you connect to from the list
    •    In the window that opens, tap on the Renew Lease button
6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
iOS 6 Wifi Problems/Fixes
Wi-Fi Fix for iOS 6
https://discussions.apple.com/thread/4823738?tstart=240
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.h tm
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Sig nal.htm
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

No connection after waking from sleep using Express as base station

I find it difficult to re-establish my Internet connection after waking from sleep.
The Airport Express is connected to a wired Linksys router. I am using the Airport Express as my main base station. The Powerbook is joining my preferred network, but I am unable to get any in- or outbound Internet traffic.
I am, however, able to connect to my Linkys and login to to its admin area. When I run Ping and Traceroute diagnostics from the Linksys web interface, everything seems to be fine-- I am able to see outside servers. So the problem is this-- I am losing my Internet connection somewhere between the Linksys router and my Powerbook. Only after I fiddle I reset the Airport Express and fiddle with the Airport menu (Turn Airport On/Off) am I finally able to get out to the Internet.
I have the channel switching set to Automatic, but I've also tried running the Airport Express at different channels to no avail.
Has anyone experienced similar problems?

Since you have an Airport Express connected to a separate router, start by disabling the router built into the Airport Express. To do this - run the Airport Admin Utility, select your Airport Express, click Configure, click the Network tab, and uncheck the setting to "Distribute IP addresses". Update settings to the Airport Express. Then - very important - restart all wireless computers.

MBA loses internet connection after waking from sleep

I have a new Macbook Air running Mavericks and new 802.11ac Airport Extreme router.
My problem is that the MBA drops the internet connection after waking from sleep. I tried the solution offered by the OP, but it didn't work.
In my case, here's what I have to do to get a connection again. I open the Network preference pane, and then choose "Assist me..." and then "Diagnostics". Invariably it will show a green light beside Wi-Fi, Wi-Fi Settings and Network Settings. I have 5 bars showing in the WiFi menu bar icon. But ISP, Internet and Server will be yellow.
When I go through the steps prompted by the wizard, the ISP/Internet/Server lights turn green on the third screen where I select the wireless network I want to join.
It seems as if it's connecting to the WiFi network when it wakes from sleep, but losing the internet connection?
Note: I have a new iMac as well running Mavericks and don't have this problem with it.

The warranty entitles you to complimentary phone support for the first 90 days of ownership.
If you bought the product in the U.S. directly from Apple (not from a reseller), you have 14 days from the date of delivery in which to exchange or return it for a refund. In other countries, the return policy may be different. If you bought from a reseller, its return policy applies.

Mail won't connect after waking from sleep

5K display iMac running Yosemite 10.2.2: When I first boot my iMac mail works perfectly as does the rest of my internet connection. I am using Ethernet directly connected to the router, but the same thing will happen if I use the wifi connection. Router is directly connected to the cable modem.
If I put the iMac to sleep and come back the next morning: I will see new messages available in my gmail and other accounts that have loaded during the night. If I hit the "get new messages" button, sometimes it will get the initial group of messages (IMAP) and move them into the POP gmail account, but most of the time mail will just fail to make a connection. The connection doctor will tell me that I'm not connecting to the internet. However, if I go to Safari or any other internet app, I have no trouble connecting.
Then, somewhere between 30 minutes and 2 hours after waking the iMac it magically connects - until the next time I put the iMac to sleep. Quitting and restarting Mail makes no difference. I have already deleted Sophos and anything else that others seemed to suggest would cause a problem. I have no trouble seeing anything in the mbox messages stored on the iMac. I just can't send or receive mail until it comes back to life.
Suggestions are gratefully appreciated.

I don't yet have Q2007, waiting for first patch to show up, but I would look for a conflict with other programs or background processes, lack of RAM, or whether you migrated some PPC application or libraries.
I see that Quicken 2006 got an update Sept. 9th.
One of the fixes in the Q2006 R5 patch:
Stability improvements were made to prevent Quicken from quitting unexpectedly when launching with certain internal files corrupted.
I would reinstall Quicken.
Rosetta:
I know it runs PPC, but if someone didn't tell me that PPC apps run under Rosetta, I would not know it was there (it isn't a listed process, and you can't choose whether to use Rosetta or not, like choosing between Preview and Acrobat). Only because under Get Info: Kind: Application (PPC) - and you would have to know that equates to Rosetta.
So you're sure it is working fine in Rosetta... I read 10.4.8 is suppose to improve Rosetta...
The best way to improve Rosetta is to have 2GB RAM.
Mac Pro 2GHz 2GB WD Raptor/Caviar RE 320 Mac OS X (10.4.7) 2 x APC RS1500s

Losing WiFi connection after waking from sleep

I've iMac 27 in. with recently upgraded OS X Lion to 10.7.4. After this was done the problems strated with connecting to Wi-Fi through my Time Capsule (2TB, 802.11n 4th Gen) after waking from sleep. Everything works fine when iMac is started after shutdown. My internet router is connected through ethernet cable to Time Capsule and iMac is using Wi-Fi connection with Time Capsule.
I've tried to install iMac Wi-Fi update v1.0 but it I cann't do it because my OS X is 10.7.4 and the update installer is stopping the installation after the check of my OS version.
Could anybody help to solve this problem, please?

but when the
computer goes to sleep and is then awakened, there
are no wireless networks listed in chooser... like
there are no wireless networks available...
Hi greaser5!
That is definitely NOT typical operation. Yes, your Core Duo iMac must restart after sleep, but It should reconnect to a working network instantaneously (less than a second), although it will probably take longer than that for your iMac to fully restart after sleep and actually be able to use the network.
Delete all prior wireless configurations that you have saved on the "Location:" selector of the Network panel of System Preferences. On the Network>AirPort>AirPort panel also delete all your preferred wireless networks. Click the "Apply Now" button.
Restart your Mac. Turn on AirPort. Use the Network panel's "Assist me..." button and the following blue "Assistant..." button to configure a fresh wireless connection to your working wireless network. This will be fresh and total, just as you did when your iMac was new. There is no need to give your network either a new name or a new password, as the old ones will work just fine in the new configuration, since as you know, the current network is working fine, the iMac simply can no longer connect to it correctly using its current configuration.
I have not been able to test the above on a Core 2 Duo, so do not know first hand if it will make any difference on those iMacs, but that or some similar fiddling should resolve the issue.

Apex fails to connect after rebooting XE

Hi:
My environment is Apex 4.0.0, Oracle XE 10.2.0, Apex default Gateway, Windows 2008 32 bit.
After I reboot the database, Apex fails to connect.
If I check the Apex port number, it lists 8080, as expected. (SELECT DBMS_XDB.GETHTTPPORT FROM DUAL;)
Look at the Oracle Listener status below after the reboot, notice the host value in line
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
When I reset the Apex port number to 8080, I can then connect OK (EXEC DBMS_XDB.SETHTTPPORT(8080); )
Look at value of HOST in the Oracle Listener status below after the reset, the HOST lists the Server Name.
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=galapp13.bsci.bossci.com)(PORT=8080))(Presentation=HTTP)(Session=RAW))
This is a major problem, because if the Server is rebooted, nobody can connect to Apex.
I assume this is an Oracle Listener problem.
I have made no changes to the LISTENER.ora file, see values below.
Any suggestions on how to overcome this problem will be helpful.
Status of Oracle Listener after a reboot.
LSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production
Start Date 02-JUN-2011 09:03:47
Uptime 42 days 22 hr. 31 min. 5 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File D:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.ora
Listener Log File D:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=galapp13.bsci.bossci.com)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation=HTTP)(Session=RAW))
Status of Listener after resetting the Port number to 8080, notice the HOST = a ServerName in line:
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=galapp13.bsci.bossci.com)(PORT=8080))(Presentation=HTTP)(Session=RAW))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production
Start Date 02-JUN-2011 09:03:47
Uptime 42 days 22 hr. 34 min. 40 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File D:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.ora
Listener Log File D:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=galapp13.bsci.bossci.com)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=galapp13.bsci.bossci.com)(PORT=8080))(Presentation=HTTP)(Session=RAW))
The parameters in LISTENER.ora
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = D:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = D:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = galapp13.bsci.bossci.com)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)

Hi
Where did you find the latest WLan driver?
Here on this Toshiba driver page you can find the latest Wlan driver:
http://aps2.toshiba-tro.de/wlan/
I recommend uninstalling firstly the old driver and then to install the newer version.
Furthermore its necessary to update the BIOS. I read in the forum that similar issues could be solved by BIOS update.
Greets

WLan fails to connect after sleep mode - Satellite T110-10x

Hi,
Everything works fine, wireless connected.
After sleep mode - it fails to connect although it detects my wireless network.
I've tried the latest Realtek driver, still no good.
I've verified that my setup is not to turn down wireless in the power options.
Any idea?

Hi
Where did you find the latest WLan driver?
Here on this Toshiba driver page you can find the latest Wlan driver:
http://aps2.toshiba-tro.de/wlan/
I recommend uninstalling firstly the old driver and then to install the newer version.
Furthermore its necessary to update the BIOS. I read in the forum that similar issues could be solved by BIOS update.
Greets

System clock fails to update after waking from sleep

I've noticed that my new PowerMac G5 Dual-Core 2GHz (running Mac OS X 10.4.3) doesn't update its system clock to the current time after waking from sleep.
When I put it to sleep and then wake it some time later, the Clock in the upper right-hand corner doesn't update to the current time. It still ticks on (second for second) but remains out of sync.
Opening the Date & Time preferences pane will restore the time to the correct setting.
This problem only occurs with sleep and then wake-from-sleep. It doesn't happen when I shut down the machine and then restart it.
Does anybody know if I've got a malfunctioning machine? It's only 1 day old...
Or better still, how do I solve this problem?
PowerMac G5 Dual-Core 2GHz Mac OS X (10.4.3)

No, my Mac is not having trouble contacting the time server. I checked the console log and found no messages related to this.
I am on a broadband always-on connection (recently switched from DSL to cable modem, and the problem occurred under both connections). However, my original post states that the computer loses time only when it is asleep, and I didn't think that my computer could contact the time server when it is asleep. It also loses time when it is off, which I neglected to mention previously. Am I mistaken in thinking that the computer communicates over the network only when it is awake? Since it keeps accurate time when awake (once I've reset it by opening the Date & Time control panel), it seems to me like it IS communicating with the time server without issue.
[And I apologize for misinterpreting your question as a suggestion. I was trying to be polite by thanking you for taking an interest in my issue. I'll watch my semantics more carefully next time.]
Cheers,
Katy
G5/dual core 2.3 Ghz Mac OS X (10.4.4) 2.5G RAM

Problems with wi-fi connection after waking up from sleep

Hey,
I have MacBook Pro 13 (early 2011), MacOsX 10.7.2.
I've got a problem - when I wake up after sleep my internet connection doesn't work for half a minute, may be more. I do diagnostics and it says that connection is ok, but still don't work. I've tried to do something with energy saving settings, but i didn't success.
What is important: I didn't have such a problem previously. I think it appeared after one of software updates. I can even remember, there was an updated with description, saying that t fixes the problem of internet connections after Mac wakes up after sleep...
How can I solve this problem?

I have the same exact problem and it is caused by the latest ETI or whatever update it is. - the one that required restart of my computer. For me it takes multiple times to turn wifi on and off on my macbook pro before the internet starts working. Someone please help. Apparently reinstalling Mac Os X 10.7.2. should help but I'm not sure if I want to drop my mbp at apple store for 2 days yet again.

JDeveloper fails to connect after enabling SSL Listen Port

Hi,
When I activate SSL on port 8002 (SSL Listen Port Enabled) for my soa_server in weblogic console, JDeveloper fails to connect to the server when deploying.
Soa server lookup takes a long time an ends in an error failed to connect to <server>:8002
When I turn off SSL JDev can find the SOA server again.
I use JDeveloper 11.1.1.4 and SOA Suite 11.1.1.4
What can I do about this?
Groeten,
HJH

Here's the top 3 causes for this:
(1) make sure the database listener is running on the server with the database.
(2) make sure the connection information that JDeveloper is using is correct.
(3) remember that JDeveloper uses the SID and not the service name.
Rob
Team JDev

Apple TV loses WiFi Connectively After waking up from sleep

My Apple TV, software version 3.0.2 (which gives us 1080P btw), works fine, until I put it to "sleep." Later, when I use the Apple TV, it says: "Not connected to the Internet." In effect, my wifi has disappeared from the memory of the Apple TV, and I have to enter the wifi network's password again on the Apple TV.
I have had this Apple TV for about a year; the problem appeared maybe one month ago.
I took it to the Apple Store after Apple Care Telephone Support consulted with engineers. The Apple engineers said it could be a hardware problem, and for me to bring my Apple TV to the Apple Store so they could diagnose it. But at the Genius bar, they put it to sleep and woke it up and it never lost connectivity every time. I suggested that as the Apple Engineers wanted the hardware looked at, why doesn't the Apple Store keep my unit, put it to sleep, and wake it the next business day? The genius bar refused, as the problem did not replicate itself at the genius bar. I told them that trying after 10 minutes wasn't enough. They should try it overnight, as I do (go to bed, try it the next day, only to discover that the Apple TV lost it's connection to the WiFi.
So for now, my work-a-round is that after a few hours, I have to reenter the password for the wifi. I've been reading threads about similar issues with the iPad, but I don't know if the problems are related (technology wise).
Bottom line: My Apple TV loses its connectivity after being in sleep mode for awhile. Nothing to do with the iTunes store or 3.0.2 as far as I can determine; if I don't put it to sleep I don't lose connectivity.

Thank you, Jamie Cox1. However, after rebooting the Apple TV, I lose my 1080P; it goes to 720P and takes about 5 minutes or so to reboot. Then I have to set the 1080P again. The good news is that the wifi returns But it is quicker merely to re-enter my password.
The problem remains: After a while of having the Apple TV in sleep mode, I lose connectivity to my wifi And while I have a complicated password (upper and lower case letters, numbers, and not a dictionary word), it still is quicker to re-enter my password than to wait for the Apple TV to reboot and re-enter the settings for 1080P.
Thanks anyway; if I only had 720P perhaps this solution might be enough - but I have 1080P.
I am working with Apple Care; I have reconfigured my wifi twice with Airport Utility, removed all interference (microwaves, cordless phones), and still the problem remains. Apple Care hasn't solved the problem. The Genius Bar at the Apple Store hasn't solved the problem. Re-booting does find the wifi again, but it takes a long time, and then I still have to re-set the resolution to 1080P. So I just re-enter my password each time.
And that's my update! I appreciate everyone's suggestions. However, the problem remains: after putting the Apple TV in sleep mode, and then later when I want to use the Apple TV, the Apple TV forgets that it is connected to wifi and I have to re-enter my password, or I can take some time and reboot the Apple TV but then while the wifi returns, the 1080P disappears.
Thank you everyone for all your suggestions
But the problem remains

Ethernet fails to connect after waking

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