D-Link routers/modems may prevent machines going to sleep

Many people on these forums have reported problems with machines failing to sleep. Two of us who contribute to the MacUser forums in the UK have discovered that what we have in common is the use of D-Link routers/modems and that when these are disconnected the problem is resolved. One is using an eMac running Panther while I'm presently using a G4 Cube running Tiger. The D-Link equipment is different - one is a D-Link DSL-504T, while the other is a DSL-300T, but both are connected via the ethernet port.
Both of us went through the usual troubleshooting procedures, including deleting the Globalprefs and Power Management preferences. Both machines will sleep satisfactorily when manually set to sleep, but neither will sleep following the options set in System Preferences (whether or not the wake when modem detects a ring or wake for system administrator settings are ticked). Disconnecting the router/modem is the only thing that will allow the machines to fall asleep automatically.
D-Link's technical support has been unable to offer any assistance that might point to why this sleep issue occurs or what the solution might be. I don't know whether this problem occurs with any other modem/routers, but it certainly doesn't happen with the Netgear device I have connected to my home iMac.
While I can't offer a solution, I thought this information might be useful to others who are experiencing sleep issues.

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Hello DeniWilco,
Since you can isolate when the issue happened the first thing to consider is doing a system restore to a time before the issue happened.
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Machine goes to sleep faster than Energy Saver settings

Hi all,
(I've searched for existing threads aboutthis but couldn't find any. Hope I'm not "re" posting)
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Hi glangston,
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ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]
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Dual 2.7 Ghz PowerPC G5 Keeps going to sleep

My Dual 2.7 PowerMac G5 keeps going to sleep - particularly when working in power hungry programmes such as Aperture. In fact it is such a problem now that I really can't use Aperture since the machine goes to sleep every minute or so. (I can always wake it up by pushing the space bar.)
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Mar 21 16:20:45 mark-levesleys-power-mac-g5 /Applications/Aperture.app/Contents/MacOS/Aperture: CGImageCreate: invalid image provider: NULL.
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Mar 21 16:21:01 mark-levesleys-power-mac-g5 mDNSResponder: Repeated transitions for interface en0 (192.168.1.65); delaying packets by 5 seconds
Mar 21 16:21:02 mark-levesleys-power-mac-g5 mDNSResponder: Repeated transitions for interface lo0 (127.0.0.1); delaying packets by 5 seconds
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Thanks
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Hi The Hatter! Thanks so much for taking the time to answer my query. Unfortunately I've tried all your suggestions (apart from reinstalling 10.4.9) and nothing has worked.
Reset the PMU; zap pram/nvram from cold start; or,
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Yes this was set on 'Never let drives sleep' anyway.
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None
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Yes it does.
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did you use the combo updater? might even want to
rerun that - after doing the old routine of "backup,
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IMac keeps going to sleep

Hi there.
I bought a second hand Rev. A G5 2 months ago. It has always been noisy - loud fan and a whiny noise. It's a bit annoying but I can live with it.
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Yesterday trying to import into iMovie was near impossible as it would keep sleeping - and the main reason for switching was because I liked the idea of iLife and using it to make DVDs of our old home movies and photos.
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Hi
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I've tested these instructions only with the Safari web browser. If you use another browser, they may not work as described.
Triple-click anywhere in the line below on this page to select it:
pmset -g assertions | open -ef
Copy the selected text to the Clipboard (command-C).
Launch the Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
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MacBook Pro won't wake up or immediately goes to sleep on boot up

Having spent some time trying to figure this one out (assuming software to be at fault), I thought it was worth sharing in case others are having similar problems.
Because of the magnetic catch design on the current MacBook Pros, if you have a stack of MacBook laptops and have the top one open, you will not be able to fully boot the machine. Once it gets to the GUI, the screen blanks and the machine goes to sleep. The magnetic catch in the machine underneath causes the machine to think the screen is still shut - lifting the machine from the top of the stack releases the magnetic field and the machine correctly interprets that the screen is open, waking up the OS.
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Indeed blackburntw,
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Rod

T420 goes to sleep on its own

Hi
I'm facing an annoing problem with my T420.
When in battery mode the machine goes to sleep after some minutes. WHILE I'm working on it...
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Solved!
Go to Solution.

Hi,
This sounds more like hibernation than sleep - perhaps from a critically low battery condition.
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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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Browsers prevent machine from going to sleep?

Is this normal? For some reason I remember my machine auto-sleeping while programs were running - and now the screen turns off but I can still hear the machine running. If I quit the browsers (both Firefox & Safari) it goes to sleep normally.
What's the deal?

Well - presumably, you have found, reviewed, assessed, and tried all the most relevant of Dale's Tips
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Your issue has been escalated to a Verizon agent. Please go to your profile page for the forum, and look in the middle, right at the top where you will find an area titled "My Support Cases". You can reach your profile page by clicking on your name beside your post, or at the top left of this page underneath the title of the board.
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How to find out what is preventing imac with os x 10.7.3 going to sleep?

What does preventing my inac going to sleep? In the morning before i leave to work everything is sound,but at the lunch time its impossible to put it into sleep mode. Tried to quit all apps,but no success. And every single day same story. Any ideas?

Test after each of the following steps:
Step 1
 ▹ System Preferences ▹ Energy Saver ▹ Power Adapter ▹ Wake for network access: uncheck. You may need to unlock the preference pane by clicking the lock icon in the lower left corner and entering your administrator password.
Step 2
 ▹ System Preferences ▹ Energy Saver ▹ Schedule… ▹ Start up or wake: uncheck
Step 3
 ▹ System Preferences ▹ Print & Scan ▹ Open Print Queue...
Check all printers for unfinished jobs. Deal with any you find.
Step 4
Disconnect all wired peripherals except keyboard, mouse or trackball, and monitor, if applicable.
Step 5
Launch the Activity Monitor application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
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Boot in safe mode and log in. The instructions provided by Apple are as follows:
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Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
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Step 8
If sleep is still working after you’ve launched all the usual applications, reboot as usual (not in safe mode) and test again. If sleep still works, you’re done, at least for the moment.
If you still have the sleep issue after booting out of safe mode, post again.

I have iPhone 4s, and using latest iOS. When I try to open any link from Twitter or Facebook, it goes to open some wrong webpage. My iphone seems to be infected or suffering from some spyware or malware. How can I remove this wrong link opening

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I think the McAfee suite will do the trick when I pay them a one-time fee of $69 or $179 for a year for unlimited support.
Your call of course but IMO a waste of money. Please read this first:
There are many forms of ‘Malware’ that can affect a computer system, of which ‘a virus’ is but one type, ‘trojans’ another. Using the strict definition of a computer virus, no viruses that can attack OS X have so far been detected 'in the wild', i.e. in anything other than laboratory conditions. The same is not true of other forms of malware, such as Trojans. Whilst it is a fairly safe bet that your Mac has NOT been infected by a virus, it may have another security-related problem, but more likely a technical problem unrelated to any malware threat.
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https://discussions.apple.com/docs/DOC-2435
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More useful information can also be found here:
http://www.reedcorner.net/mmg/

OneNote prevents my computer from going to sleep when I have a shared notebook open. Suggestions?

Hello,
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Try modify the settings under:
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Max Meng
TechNet Community Support
A new Office has arrived, try it now.
A beautiful Start. It begins here. Windows 8 and Windows RT.
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

I use aol mail, and I want to change my mailto: to aol. Firefox won't let me do that. When I click on an email link in a webpage, my computer goes nuts.

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Hi, cor-el,
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What do you suggest?
Thanks again.
Sherri

D-Link routers/modems may prevent machines going to sleep

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