Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

My computer went to sleep (actually, it looked more like hibernating) in the middle of an active time, without any warning.

In the Event log, the message was:

The system is entering sleep.

Sleep Reason: Application API

It doesn't give any other information. Is there a way to find out which application caused this call?

share|improve this question
    
Is this totally random or do you notice any pattern? –  Dave Rook Oct 8 '12 at 7:53
    
@DaveRook It happened only once so far, but I'm curious about ways to diagnose such event, in general. –  Gnoupi Oct 8 '12 at 9:20
    
@DaveRook - I managed to reproduce it. It happens when i play on external monitor (tv). As long as the lid of the laptop is opened, no problem. When I close the lid, it will go to hibernate after around 10 minutes. Easy to circumvent for my personal case, but that doesn't tell the actual culprit. –  Gnoupi Oct 8 '12 at 17:03
add comment

1 Answer 1

Check task manager and ensure there is nothing in there which prompts this behavior. Or check the power options.

You can use a clean boot to find if another program running at the same time as Internet Explorer is causing this to happen. A clean boot with only load Microsoft processes, and allow you to identify which process is causing the problem.

  • Click Start
  • Type msconfig into the search field
  • Press Enter on your keyboard
  • Click Continue on the User Account Control (If prompted)
  • Click Selective startup
  • Uncheck Load startup items
  • Click the Services tab
  • Check the Hide all Microsoft services box
  • Click Disable all
  • Click OK
  • Click Restart Now

Once your computer has finished restarting, test to see if you still get the same problem in Internet Explorer. If not then you just have to identify which service/startup item was causing the problem.

  • Click Start
  • Type msconfig into the search field
  • Press Enter on your keyboard
  • Click Continue on the User Account Control (If prompted)
  • Click the Services tab
  • Check the Hide all Microsoft services box
  • Check (Enable) the top half of the service boxes
  • Click OK
  • Click Restart Now

Once your computer has restarted, again test to see if the problem is still gone. If so, then the services you enabled are good to stay. Repeat the enabling process for half of the remaining disabled services and continue this process until the problem returns or all services are enabled. If the problem returns then you will need to test the last batch of services you enabled one by one to find which was causing the problem to occur.

If you enable all services and the problem still hasn’t returned:

  • Click Start
  • Type msconfig into the search field
  • Press Enter on your keyboard
  • Click Continue on the User Account Control (If prompted)
  • Click the Startup tab
  • Check (Enable) the top half of the service boxes
  • Click OK
  • Click Restart Now

Follow the same process as before, with testing after each restart. If the problem hasn’t returned, go back and enable half of the remaining list of startup items and continue the process until the problem has returned. Then you will need to test the last batch of startup items you enabled one by one to find which causes the problem to occur.

Once you have identified which service/startup item causes the problem in Internet Explorer you will need to either disable/uninstall/update the program to avoid further problems.

Source

share|improve this answer
    
Empirical method. It would be effective ultimately, in the event that this is a problem which is reproducing regularly, though it would consume a LOT of time. So far, it happened to me once only, so it wouldn't be really adapted. Either way, it's more of a last resort. –  Gnoupi Oct 8 '12 at 9:42
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.