Sunday, January 06, 2013 3:45 AM
I have just built this computer and sleep mode was working correctly until a few days ago. When I manually tell Windows to go into sleep (S3), the screen turns off and it looks like it is going to sleep but then immediately awakens displaying the windows login screen. I have tried numerous things: adjusting power options, power plans, disabling wake on lan, etc. But it does not seem to respond to anything. I know it cannot be a hardware problem because under Linux when I put the machine into S3, the computer sleeps normally. I have looked at the event viewer for events 1 and 42 which are respectively 'Power-Troubleshooter' and 'Kernel-Power'. Both of these events are present when sleep mode was working correctly. Since the problem occurred, both of these events have been absent from the logs. This gives me reason to believe that the system is not acknowledging the requests for sleep. Does anyone have any insight or ideas as to what the problem could be?
Monday, January 07, 2013 3:10 AMModerator
Please check the issue referring to the methods in the following Knowledge Base article:
Windows 7 does not go to sleep
Hope this helps.
TechNet Community Support
Monday, January 07, 2013 5:33 PM
Thanks Spencer, I believe I have solved the problem and was waiting to be sure before I responded. The article you suggested lists the powercfg command help page as a source of additional help. After trying a few different things, I found that running: powercfg -h off (to disable hibernation) solved the problem. I am unsure of how this could have been changed as I do not believe there is a way to change this option through "Power Options" in the control panel.
powercfg command help: http://technet.microsoft.com/en-us/library/cc748940%28WS.10%29.aspx
- Marked As Answer by the_machine Monday, January 07, 2013 5:33 PM