If you set it to 0, then the device will never go to sleep.

Mark Kent (MCP)
Sr. Desktop Systems Engineer
Computing & Technology Services - SUNY Buffalo State

From: [email protected] [mailto:[email protected]] On 
Behalf Of Raghav, Abhishek
Sent: Sunday, September 29, 2013 11:30 PM
To: [email protected]
Subject: [mssms] RE: Machine returns to sleep too fast for WOL advertisements

This is because the setting "Idle timeout before the system returns to a low 
power sleep state after waking unattended." value is set to 120 (Seconds) by 
default. You need to change it to '0'.

Run the following command to list the power schemes (* will show the active 
scheme).

POWERCFG.EXE /LIST

[cid:[email protected]]

Then run following command to set the "Idle timeout before the system returns 
to a low power sleep state after waking unattended." Value to 0.

POWERCFG.EXE /SETACVALUEINDEX <POWER SCHEME GUID> 
238C9FA8-0AAD-41ED-83F4-97BE242C8F20 7bc4a2f9-d8fc-4469-b07b-33eb785aaca0 0
POWERCFG.EXE /SETDCVALUEINDEX <POWER SCHEME GUID> 
238C9FA8-0AAD-41ED-83F4-97BE242C8F20 7bc4a2f9-d8fc-4469-b07b-33eb785aaca0 0

Thanks,
Abhi

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Miller, Todd
Sent: Friday, September 27, 2013 10:18 PM
To: [email protected]<mailto:[email protected]>
Subject: [mssms] Machine returns to sleep too fast for WOL advertisements

I am waking up machines to run an advertisement at  3:00AM.
On a sample machine, it wakes up at 2:57:06AM and goes back to sleep at 
2:59:51AM - and so does not run the 3:00AM advertisement.  I can see the proof 
of the WOL working in the client's system event logs.  It feels like 2 minutes 
is just not enough time for my clients to wake from sleep, reestablish a 
network connection send events to the MP and then get the tasks executing.   It 
exits the "recently resumed state" process at 2:59:12 which doesn't leave time 
to kick off an advertisement.

In the morning when I go to check on the success/fail, I waggle the mouse and 
when I look in the logs, I see the missed advertisement runs when the machine 
is woken up by the waggle (but not at the WOL time).

This is a recurring advertisement and it has happened 2 nights in a row now.  I 
mention this because I am certain that the machine "knows" it is supposed to 
run an advertisement at 3:00AM.  It seems like SCCM agent for some reason is 
failing to let the OS know it is not supposed to go to sleep because there is a 
pending advert - or at least it is not getting that message to the OS in time 
to prevent a return to sleep.

I have a similar problem that could be related.  I have seen clients go to 
sleep right in the middle of a software inventory.  This happens a lot on 
laptops where the sleep timeout is set to 15 minutes.  A user wakes up a laptop 
after not using it for several days, SCCM starts a software inventory because 
it is past due, and then the computer goes to sleep in the middle of the 
inventory process.  I would think if SCCM is doing anything or is scheduled to 
do something in the next 5-10 minutes, it would prevent the OS from sleeping.

Has anyone else had this problem?  I am thinking of modifying the "go back to 
sleep from WOL" setting to be > 2 minutes, but there is no GPO or GUI for 
setting it so that could be messy.

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