Wifi drops after going to sleep

I am running Snow Leopard 10.7.5 and eveytime my mac goes to sleep it drops wifi and will not reconnect, the wifi bars shows full and connected but the internet will not work. help! thank you.

From finder screen, shift, command,U. To get to finder screen if you have something open, click on a blank part of the screen (your desktop background, it should say Finder on the top left on the menu bar, just right of the Apple logo.

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My new Mac Air continues to disconnect from WiFi after going to sleep. When waking it up I have to manually re-connect. How do I keep it connected?

My new Mac Air continues to disconnect from WiFi after going to sleep. When waking it up I have to manually re-connect. How do I keep it connected?

I had this problem too and solved it by doing a clean install. After that it was gone.
This is a drastic method since it takes quite some time to reinstall lion and all your software.
Thoughts I had why it started working after a clean install are the following:
It looked like the airport wasn't able to reconnect fast enough before the connection timed out. So what could have prevented my mac from being able to connect fast enough?
Apps that consume processor cycles. I love what I would call 'System Enhancers', little apps that enhance my workflow (Moom, Alfred, Dropbox, Default Folder etc). I'm not saying that these are the problem, they might be programmed processor friendly, but check if you have apps that consume processor cylcles. It might prevent airport from being able to reconnect quickly enough before it times out.
Mobile Config profiles. Another thought I had was that I had a mobile config 802.1X profile installed for the company were I worked. It used TTLS to connect to the corporate network. This profile might have gotten in the way.
And a sidenote...
Routers with hardware acceleration might also be a problem. My router is a Wireless Gigabit Router 300N WL-351 and has hardware acceleration. As soon as I activate that my wifi connection keeps dropping. It is as if a Macbook Air can't handle that amount of optimisation.
That's it, hope it helps those who are still having the problem.
Best, Jan

ThinkPad T420i won't wake up after going to sleep.

My T420i won't wake up after going to sleep (using Fn F4 or close the laptop or time out). The computer was wiped clean and reinstalled with only Windows 7 professional and some Levono softwares. BIOS, windows and all drivers are up to date. The only way to get it back is hold the power button to reboot it. When it reboots, i get improperly windows shut down error.

I'd guess it's ACPI related issue. Check out ACPI driver and correspondent items in Control panel.
Energy report might be helpful too ("powercfg -energy" command within console window with administrator rights)
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Power Mac G4 loses internet connection after going to sleep

Run down of computer: I have a Power Mac G4 tower, PANTHER OSX. I have wireless internet through our cable company—I use a wireless router. When I am connected to the internet, and browsing the web or something, if I let the computer go to sleep, it loses connection. I have to go back up to the little signal icon and reconnect to my wireless network.
I suspected it might be a setting through the router, but when my computer was comletely unplugged, and absent from the apartment, the other computer (G5 imac–TIGER) which was having the same problem, suddenly was staying connected even after going to sleep. When my computer came back home and was hooked back up, suddenly the other computer had the same problem again. So, I concluded that my G4 tower was the culprit, and perhaps not the router. We share a wirless network, so it's not surprising that this is the case.
I know there must be a setting somewhere in preferences or something that is telling the computer to disconnect from network when computer sleeps. I have looked everywhere, and can not figure it out.
It's really annoying to have to reconnect each time I use my computer. And just to reiterate, I get internet through a cable modem using my airport card, so please answer the question with this in mind as settings are totally different from dial-up. I do not use PPP.
Anyone experience this problem? Or know how to help?
Power Mac G4 Tower Mac OS X (10.3.4)
Power Mac G4 Tower Mac OS X (10.3.4)

Tried that too! Notta.
This one's really a pickle! Even the Mac specialist at my office was baffled! He suggested shortening the name of my computer...(Jamie Cendroski's computer)...I didn't really understand how this had anything to do with it...but he's supposed to be the expert. He also suggested trashing my keychains and making new ones. I messed around with them, but I don't know enough about this stuff to be bold enough to trash them yet. I'll do a little more research before I do so. I think he might be onto something with the keychains though..?

My 13" early 2011 macbook pro is having trouble connecting back to internet after going to sleep. before updating to EFI 2.7 it was perfect now after updating its gone bad

My 13" early 2011 macbook pro is having trouble connecting back to internet after going to sleep. before updating to EFI 2.7 it was perfect now after updating its gone bad.

Same issue here too. I will try reinstalling the firmware update. This has happend to me twice. The only way to correct the issue was to reboot.
Thanks!

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.

Mac won't re-start after going to sleep

Since installing a new version of FaxstfPro (version 10.7), my MAC won't re-start after going to sleep. I have to re-boot to get the system started again.
Thanks for any ideas on how to re-store the sleep fucntion.

Thanks for the excellent tip. From reading the bluetooth advisories, I realized that my D-link was incorrectly installed in a UBS hub. Moving it to a direct UBS port resolved the problem.
During the trouble shooting process, I found that I do not have a Bluetooth setup assistant. I have recently installed OS X 10.4.6 and also applied the Bluetooth firmware update, but I can not find the Bluetooth setup assistant in Utilites, and a search via Finder didn't locate it either. And I can't find the software in the .Mac downloads.
Any suggestions on how to restore the assistant?

Wifi dropping after installing yosemite

Problem with wifi dropping after installing Yosemite. Any help out there?

There are definite bugs in Yosemite that need to be addressed by Apple. Multiple people are experiencing Wifi issues with fresh installs of Yosemite.
I was experiencing consistent Wifi issues after a fresh install of Yosemite. I validated that it wasn't my computer or router by doing a fresh re-install of Mavericks. Wifi works flawlessly under Mavericks but always fails under Yosemite. No other software was installed as part of this test.
Here is my configuration:
Model Name: MacBook Pro
Model Identifier: MacBookPro8,1
Processor Name: Intel Core i5
Processor Speed: 2.4 GHz
Number of Processors: 1
Total Number of Cores: 2
L2 Cache (per Core): 256 KB
L3 Cache: 3 MB
Memory: 10 GB
Boot ROM Version: MBP81.0047.B27
SMC Version (system): 1.68f99
Serial Number (system): C2QGV006DVHJ
Hardware UUID: XXXXX
Sudden Motion Sensor:
State: Enabled

T400 does NOT wake up after going to sleep

T400 does not wake up after going into sleep. It goes to sleep ok but everytime wheni try to wake it, it restart the whole system instead of waking up.
I have checked the BIOS Security setting and it already set on Active. All drivers are upto date.
Please help!!
Message Edited by farooqjilani on 03-09-2009 08:23 AM

I have a similar issue with a T400 (xp sp2).
suddenly, it won´t come back from sleep. i have to press & hold the power button to turn off the computer, and then press again to turn it on from scratch.

HP Envy shutting down after going into sleep mode

Hi. I'm not sure where to post this so I'll try it here.
My laptop shut downs automatically when it goes into sleep mode. Not right away when going into sleep mode. Maybe like an hour later after going into sleep mode.
I'm not sure it's overheating because it never shuts down while I'm actually using the laptop.
Do you guy have any idea how to fix this?
Product name and number: HP ENVY TouchSmart Sleekbook 4-1115dx
Operating System: Window 8
Error Message: None
Any changes to your system before problem occurred: No

Hey Tecmo_SB_Guy,
I would suggest you take a look at advanced power settings. It can seem like the notebook is turning off when it is actually just hibernating. You can set it to not hibernate.
1. Windows key + Q to open the Search Bar
2. Type "power"
3. Click Settings under the Search Bar
4. Select Power Options from the results on the left.
5. In Power Options, Click Change when the computer sleeps, on the left.
6. Set the Put the computer to sleep setting so that it fits your usage best.
7. Click Change advanced power settings, at the bottom.
8. Expand Sleep and expand Hibernate after. If you want you can change the hibernation setting to Never by typing "Never" into the minutes field. See attached picture. You can do this for battery and/or plugged in.
9. Click Apply to save changes.
If you don't already shut it down periodically, I would suggest shutting it down at least 2-3 times a week if you use it daily. Leaving the computer running continuously can shorten its lifespan. Hard drive failures and motherboard issues are seen much more often on machines that are left running constantly. Computers get bogged down and run slowly when the memory is full. Memory only clears out and resets itself when the computer is shut down. Here is a link explaining more about memory accumulation and hardware aging.
I hope these suggestions help! Please let me know if you have any questions
Attachments:
PowerHibernateNever.jpg ‏59 KB

MBP 13in drops wifi when computer goes to sleep, I have to restart the computer to reconnect. Help?

I recently did the Lion update on my MBP. Since then my computer will drop wifi connection everytime the computer goes to sleep. It will not let me log on network saying invailed password. I have to restart the computer and then it connects automatically. This is NOT a router problem. Skip any and all advice about routers. I have 4 other Apple products all connected to wifi perfectly. This is a MBP issue. Please help.

On the MBP, go to /Library/Preferences/System Configuration
Move all the files in the System Configuration folder to the Trash.
Restart the Mac.
It will not let me log on network saying invailed password
Just in case, open Keychain Access located in /Applications/Utilities
Select Passwords on the left.
Use the search field top right corner of the window to locate your network keychain.
Now right or control click the keychain then click Get Info then select the Attributes tab.
Click: Show password
Make sure it's correct.
And launch AirPort Utility /Applications/Utilities
Select the connection on the left the click Manual Setup.
Select AirPort from the menu then select the Wireless tab.
Make sure the password is available there then click Update.

Thinkpad Yoga wakes up on its own after going to sleep blaming lid if wifi was enabled

Recently I've noticed that my Thinkpad Yoga (20CD00B1US) keeps waking up on its own.
powercfg lastwake returns
Wake History Count - 1
Wake History [0]
Wake Source Count - 1
Wake Source [0]
Type: Device
Instance Path: ACPI\PNP0C0D\2&daba3ff&2
Friendly Name:
Description: ACPI Lid
Manufacturer: (Standard system devices)
It happens either if lid was kept open and I used power button to put it to sleep or if I just close the lid. As soon as I do that I can see red LED goes on and off slowly so I know it is sleeping. However within 5 minutes or less, I see that red LED on top of "i" constantly lit.
If I do powercfg -devicequery wake_armed , I get
Intel(R) Dual Band Wireless-AC 7260
That is really odd. I have WPA2 (PSK) wireless network, and I'm confident other devices are not that smart to send any WOL packets (or whatever it is called for wireless). Also I have AMT and other stuff disabled in BIOS. Intel Smart Connect has Remote Wake set to OFF, Keep Data Fresh is OFF as well. The problem goes away if I turn flight mode (turn off wifi) before sending PC to sleep.
Does anybody else experience similar behavior and what can I do to prevent waking it up without flipping wifi switch? It is so strange that the lid is at blame while the problem is somehow related to wireless adapter.
P.S. Installed BIOS version is 1.05 (not the latest 1.06). All essential updates are installed.
Solved!
Go to Solution.

You may wish to check the WNIC's properties in Device Manager to see if Allow this device to wake the computer under Power Management is selected. If so, deselect to see if your issue is resolved.
Regards.
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13"w/ext display loses WiFi connection after waking from sleep

I have my 13" macbook pro (mid-2009) connected to an external monitor. When the system goes to sleep and wakes up, the wifi is disconnected and an error window pops up saying something to the effect of another computer is using the IP address assigned to my computer.
If I reset the modem it usually works, otherwise I must wait about 15 minutes for system to connect again.
It does not happen if there is no monitor connected to the notebook.
Is there something I can do to stop this from happening?

I have a strong suspicion that I am getting wifi interference from my neighbors. Several new wifi signals have appeared in the last month coinciding with new neighbors moving in and some old ones getting wifi. Upstairs, I can pull up 6 or 7 networks, some broadcasting on the same channel. Downstairs, where my MacPro resides, I do not see those networks. My problem seems to manifest itself on my MacBook Pro when I move upstairs and can pick up the extra networks.
When I power cycled my router this morning, I noticed it changed channels from 11 to 6, indicating that the Auto setting is determining a better channel. Also, this problem seems worse after 5 pm. So, I'm chalking this one up to neighbor interference. If my iPhones could use the 5 GHz band, I'd use that exclusively... or maybe it's time for a simultaneous dual band router.
I wish I had a dollar for every time I've advised a customer that interference was the cause of his wireless connectivity issue.

Lenovo A--730 wifi drops after five minutes, reappears on disconnct/reconnect

I have a lenovo A-730 tab and I have been facing issues with my wifi.
Here are the details of my tab:-
Model number - LenovoA3300-GV
For the first five minutes, it works like a charm, then the connectivity goes away. Though, the wifi signal strength shows full.
Again, if I turn wifi off and again on, it works for another five minutes again and then stops working.
This is a consistent issue.
Somehow, it seems I am missing some settings or some software issue.
Please guide me in this regard to get this issue of mine fixed.

Hi,
I tired the steps given in this link.
http://www.xda-developers.com/kitkat-wifi-drop-fix/
The steps are:-
1- goto Settings > WiFi settings
2- long-press on Connection
3- Select "Modify network config"
4- check the "Show advanced options" tick.
5- select proxy settings to Manual
6- proxy host name , input the value from 192.168.1.1 to 192.168.1.225
7- Proxy port = input one of them "8080" , "3128" , "80"
8- press the "Save".
9- turn wifi off and the On, you will not see the message ""Sign into Wi-Fi network"
10-now repeat the steps from 1 ~ 4
11- and revert back the proxy settings to "None", its Done.
12- you will be fine with this network.
But no luck, after five minutes, the wifi again goes off after five mins and again comes up on doing disconnect/reconnect.
One more thign did not understand here is as per step 6 to 8, we are changing the proxy and doing the required setting and saving it.
Then, in Step 10, we are reverting it back to the original state as we are setting proxy to none again.
Will it solve the purpose or am I missing something.
My issue is still not fixed

HP PHOTOSMART ALL-IN-ONE 5510 WONT PRINT AFTER GOING TO SLEEP MODE

My printer model:
HP PHOTOSMART ALL-IN-ONE 5510 B111A
Problem:
Printer goes to sleep mode. After 25-30 minutes the wireless connection between the PC and the printer breaks. Blue Wireless light is on even at the sleep mode and I can see that the printer is connected to my router and there is internet connection. HP Print and Scan Doctor sees the printer but I cannot awake the printer unless I restart it.
What I have tried so far:
I have tried all the solutions hp.com offered including; reinstalling driver, updating printer software, setting static IP to printer, setting static DNS servers, using HP Print and Scan Doctor.
I have seen people asked about this question before and there was no solution. I really need HP help!
This question was solved.
View Solution.

Let’s try this. Verify in the printer that 'Auto Off' is disabled. Set a static IP in the printer outside the DHCP range of the router. Use a fixed wireless channel like 1,6 or 11, never 'auto', try channel 1 first then the rest. Set router to 20Mhz only, or 145Mbps depending on router. Always use WPA2-AES encryption. Power off both. Power on router wait 3 mins. Power on printer and verify it reconnects to router. Now try.
Say thanks by clicking the Kudos Thumbs Up to the right in the post.
If my post resolved your problem, please mark it as an Accepted Solution ...
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Wifi drops after going to sleep

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