AirPort drops connection after waking up from sleep?

Hi, this situation only occurs on my university campus. My university has a 802.11b wireless network. It makes up about 28 hotspots blanketing the entire main campus, it has a 128bit WEP encryption 26hex and a proxy.
If I attempt to connect the first time, I would get connected. Once I put it to sleep then wake it up, it loses the connection and I would not be able to reconnect (while being bombarded with the error message, "There was an error joining the AirPort name 'xxxxx'") until approximately one hour has passed.
All troubleshooting steps have been tried (deleting p.list files, caches, keychains, reseting AirPort, reseting PMU and PRAM, reformatting HD, you name it, it's been done by my university's computer staff and by a Genius).
I'm currently frustrated not only I can't resolve this issue, but there's finger-pointing from both sides (Apple Genius blaming my Temple Univ wireless network, then Temple blaming on my AirPort's drivers/hardware) and there's nothing conclusive I can prove to both sides (not to mention my MacBook is only 1 week old and only 2 people including me have reported this issue at Temple). I have done one experiment to show that my home Linksys router with 128bit WEP encryption works flawlessly and to testify saying that the previous Core Duo MacBook I had work flawlessly with the Temple wireless network.
Any suggestions?
White MacBook 2.0GHz Core 2 Duo Mac OS X (10.4.8) 2GB RAM, 120GB HD

Welcome to the Apple Discussions!
This may not actually "solve" the problem, but it may help you bypass it. On my MacBook, I have a network location called "No Networking". I use this location in between some other networks when I have trouble switching (for example, I can switch from my home AirPort network location to my work Ethernet location without any problems, but I can't seem to go the other direction). The "No Networking" location has ALL of the network ports disabled. This is also helpful if you're on an airplane or somewhere you know you won't be using the network because the AirPort card and the Ethernet port actually use battery power to run if you're not plugged into the AC power. So, turning off the ports saves you a few minutes on battery power. So, when I arrive at home, I switch from my "Work Ethernet" location to my "No Networking" location, pause for a couple of seconds and then select my "Home AirPort" location and everything seems to be fine.
To do this, open the Network System Preferences and use the "Location" pop-up menu to create a "New Location". Give your new location a name like "No Networking". Then select "Network Port Configuration" from the "Show" pop-up menu. Uncheck every port and click the "Apply Now" button.
I have a different network location for each of my possible networking options I encounter. When I have trouble moving between two, I just select the "No Networking" location from the Apple menu and then I select the right network. See if that doesn't help some.
-Doug

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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

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Hey,
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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...
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... I un-ticked the "put hard disks to sleep when possible" option in the Energy Saver panel in the System Preferences, and it seems the problem is solved. will have to sleep and wake up my iMac to further verify if this is the solution ...
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Ethernet interface disappears after waking up from sleep

Hi guys,
I've been trying to debug a networking problem without any luck and I think it's about time I ask the forum for help.
My ethernet interface no longer works after I wake up my computer from sleep. I have no idea why.
Before sleep:
# ls /sys/class/net
lo wlp2s0 enp3s0f2
After waking up from sleep,
ls /sys/class/net
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UNIT LOAD ACTIVE SUB DESCRIPTION
dbus.service loaded active running D-Bus System Message Bus
[email protected] loaded failed failed dhcpcd on enp3s0f2
[email protected] loaded active running Getty on tty1
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It seems to be fixed after the kernel update. On an related note, I've switched from using dhcpcd to netctl. I've enabled netctl to automatically connect to the network using:
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netctl@ethernet\x2ddhcp.service - Networking for netctl profile ethernet-dhcp
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It seems that this problem is unique to my system. I am hoping that one of the Mac Guru's will have at least a pointer in the right direction.
Thanks.

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Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, or by a peripheral device.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output andWi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

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If you can't solve your issue and no one in the community can help, contact support to speak with a tech support agent at (800) 457-7777.
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Why does my Mac screen suddenly go dark? Sometimes it stays dark for an indefinite period after waking up from sleep.

Why does my Mac screen suddenly go dark? Sometimes it stays dark for an indefinite period after waking up from sleep. I have to open and shut the monitor screen to get it to light up again.

Might try posting in the MacBook Pro laptop forum. This is the Mac Pro desktop forum.
Also see:
OS X: When your Mac doesn't sleep or wake

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

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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.
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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

Track pad freeezzzz after waking up from sleep mode

HI
i have OS X Ver 10.5.1
i have enough ram, disk space, and have the 2.4 GHz Core 2 Duo processor.
but when my mac wakes up from sleep the track pad is just not behaving properly, i.e it keeps jumping positions and freezes until i restart. if this continues it will be very frustration to use leopard.
also i did not get the option to archive and install at the installation so i cant even down grade, this is one of those time i trusted that everything will go right and looks like the problems just begun.
please help me !
Vinod

Hi,
I have almost the same problem with my T540p, except that there is no internet connection not only after waking up from the sleep mode, but also when starting windows and sometimes the internet connection will get suddenly lost during normal windows run.
I tried installing all kinds of drivers - latest from intel, latest from lenovo update (which is always different version from the one from intel), some older versions. Nothing helps.
Re-enabling the WiFi device like Aaziz1982 suggested, doesn't help.
Here is a more detailed description of my problem: http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T540p-WiFi-Connected-no-internet/m-p/177818...
Does anyone have other suggestions?
Thank you,
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Compaq C700 - CPU fan not running after waking up from Sleep mode

Hi guys,
Waking up from Sleep mode does not start the CPU fan.
Kernel: 2.6.32-ARCH
KDE : 4.4
Let me know what other details you need.

I was having the same problem after installing mountain lion.
What i did was in Finder went to /Library/Preferences/SystemConfiguration/ and deleted all the networking plists (refer screen shot). Then restarted the Mac and in Network Preferences reconnected to my WLAN.
That solved the problem.

Macbook connectivity lost after waking up from sleep mode or rebooting

Being an Ex-Microsoft user , I am sad to say that Microsoft products still beats Apple's MAC in stability for certain functions.
For instance, this Macbook laptop does not seem to be able to reconnect to the home's gateway/ router (or any other gateway, for the matter) after it wakes up from sleep mode or rebooting.
I've read several similar posts on this topic in the internet and am convince to say that it is not the gateway/ router that the Mac is connected to giving the problem as there are other computers(Microsoft-based) connected to the same gateway working perfectly fine.
Furthermore the Fujitsu laptop I was using previously had connected to the gateway flawlessly... until the darn-thing broke down (grumble....grumble...)
So far, it seemingly so, that no other person has managed to figure and resolve this one out yet. Also, no Apple support staff has responded nor helped resolved other related-connectivity problems.
Is there a real hope for us??

The previous solution only worked for a few days.
I have another fix from Apple that is working (for now):
Go to the network preference pane and create a new location by using the location pull-down menu. Call it whatever you want.
Select the new location. Choose the little tool icon dropdown under the left column of services and choose "set service order" Drag things around so that airport comes first and then ethernet. Save, apply, do what you need to do to save all of these settings. Restart the computer.
There might have been some other steps, but these are the main and most important parts.
The default configuration for service order is wrong and the computer gets hung looking around for a bluetooth or firewire network connection. After every major system update, check that the service order is set right--it could get overwritten.

I lose network connection after MacBook Wakes from Sleep

I upgraded to Mountain Lion on my 27" iMac and 15" MacBook Pro. iMac is doing fine. MacBook Pro, however, when it wakes from sleep, seems to have the network untility crash.
So the computer wakes from sleep, and the little status bar radar thing does its little sweep and doesn't just go solid. . If I click on it, it shows my Airport as connected, but after clicking, it freezes. the second to the bottom bar goes solid and the cursor becomes a spinning beachball. If I open system preferences, and select network, it freezes. The only way I can seem to get back on line is to reboot. I have an airport extreme with an older (g) airport express that I use to beam music to my stereo. The MacBook Pro is about 2009 vintage—you can still get to the battery, HD and memory—and the iMac is a bit later. One of the first 27" models, not quad core.
Anyone else having this problem? What more info would you need to help resolve? I'm a novelist and this is killing my productivity.
Thanks,
Steve
http://stephenstark.me

Try the basics first:
Change your router channel number. Most times this works & is all you have to do.
Disconnect & reconnect your modem. unplug it for about 10 seconds. Plug it back in. Do the same for Apple’s routers. Wait for everything to reboot.
System Preferences>Network
Click the Assist Me button.
In the next window that pops up, click the Diagnostic button & do the necessary.
Research Knowledge Base for network problems that pertain to the OS that is currently installed on your computer. See these basic networking KB Articles: http://support.apple.com/kb/HT1401 AirPort troubleshooting guide
http://support.apple.com/kb/HT2712 Using network locations in Mac OS X
Manually provided DNS server addresses are higher priority than DHCP's
http://support.apple.com/kb/HT1714 Solutions for connecting to the Internet, setting up a small network, and troubleshooting
============================
What to do when you can't connect to the Internet
Also, run the Airport Utility app which is located inside the Utilities folder.
=====================
If using a Linksys router, contact LinkSys Customer Support and/or post in their forums.
If using Apple's Airport, please re-post over in one of the AirPort Forums.

Dead USB controller after waking up from sleep

Hi,
I posted this a while back but the issue is still unresolved. I am experiencing USB port sleep issues after upgrading to Tiger (currently running 10.4.8). Sometimes the build-in USB port that has my keyboard connected to literally wakes up dead from sleep. Here is the error message from the Console log
(XX-Computer kernel[0]: USBF: 24445.528 AppleUSBOHCI[0x15ab800] Watchdog detected dead controller (hcca #: 56759, hc #: 64465).
This happens with no set pattern, sometimes it wakes up fine, other times the port is dead. A restart is required to bring it back to life.
Any ideas why this is happening? If I plug in my keyboard to the other USB 1.1 port everything works fine (the port remains dead until the next restart). I also have a USB2 PCI card that works with the keyboard without any dead port issues but I can't use it for waking the computer (does not trigger wake up), but I simply prefer to use one of the equipped USB ports for my keyboard.
I have 2 external FireWire HD's connected at times, one daisy-chained to an external FireWire CD Burner. I have a USB 1.1 hub connected to the other equipped USB 1.1 port, and a USB 2 PCI card installed.
I run system maintenance tasks frequently (Onyx) and repair permissions prior and post SW installs and updates.
Thanks for any input.

It seems that this problem is unique to my system. I am hoping that one of the Mac Guru's will have at least a pointer in the right direction.
Thanks.

AirPort drops connection after waking up from sleep?

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