If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Rate Thread | Display Modes |
#1
|
|||
|
|||
Win 7 PC Suddenly Will Not Sleep
PC has always been set to sleep after 20 min. Display sleeps as
expected, but PC has suddenly stopped sleeping. No hardware/software changes other than Windows Update. Cannot find a clue in MS Support. Any suggestions? |
Ads |
#2
|
|||
|
|||
Win 7 PC Suddenly Will Not Sleep
Frank L. Thiel wrote:
PC has always been set to sleep after 20 min. Display sleeps as expected, but PC has suddenly stopped sleeping. No hardware/software changes other than Windows Update. Cannot find a clue in MS Support. Any suggestions? https://www.sevenforums.com/performa...ng-system.html powercfg -energy -output %USERPROFILE%\Desktop\Energy_Report.html If you don't specify the output location, the report ends up in what looks like the current working directory. I tried running that from an elevated (administrator) Command Prompt. And because the test was done in a Windows 7 VM, it said: "System firmware (BIOS) does not support S3" So that's my sleep-blocker right there. Your sleep-blocker won't be that one, unless you have some older hardware, and the default in the BIOS was S1, instead of "S1 & S3". And while there is another command, I'm not sure it has any diagnostic value. powercfg -devicequery s3_supported That one lists lots of things that support S3 sleep, but it won't tell you about critical (i.e. real hardware) ones that are blocking sleep. So my guess is, the energy report will have to do. There are several possibilities for ACPI problems: 1) System tries to enter a state, crashes, and restarts. Sometimes a shutdown, where the system won't stay shut down, is actually a crash followed by an automatic reboot. 2) System tried to enter sleep, and a wake_armed device immediately wakes it up again. A NIC set to "wake on carrier" will wake in about 10 seconds or so. There are other values for NIC waking which will stop that. I have two mice here, and the Microsoft mouse will wake the computer if it moves a couple micro-inches. So that mouse must be disabled in Device Manager. The powercfg "-lastwake" command may help with those. 3) System cannot enter the desired state, because a "blocker" is present. (Use energy report.) Those are some examples. Paul |
Thread Tools | |
Display Modes | Rate This Thread |
|
|