Solved Computer keeps waking up from sleep after around 30 mins

I cannot understand that when I select the Sleep Mode, I find that after approx 30-60mins its awake again. Has anyone experienced this and has the answer. I am running Windows 8.1 64 bit, Avast AV and Firefox my browser.

Its a question of whats need to be disabled for it to continue the Sleep Mode - but I don't want to keep disabling varoius pieces of software if someone already has the answer.

Some event is waking it up (ie ethernet, lan, USB device).

Try going to Device Manager and click on your Ethernet adapter and choose power options and uncheck Wake Up on lan/Internet action. This worked for me.

To add, I turn off power settings for USB devices, Ethernet, Wifi, also check task manager for any events, along with change settings in Power.

Many thanks to all - thanks also to JM44jp39 - I have had prevoiusly turned off the Ethernet Awake Power Option, but something is still waking it up.

After it wakes, in an Administrative Command prompt run the following command. Copy and paste the results if you want.

powercfg -lastwake

Many thanks for your support. I have done as you said and this is the screen dump below. What can you suggest


Microsoft Windows [Version 6.3.9600]
(c) 2013 Microsoft Corporation. All rights reserved.

C:\Windows\system32>powercfg -lastwake
Wake History Count - 1
Wake History [0]
Wake Source Count - 1
Wake Source [0]
Type: Device
Instance Path: PCI\VEN_8086&DEV_8C31&SUBSYS_06221028&REV_05\3&11583659&0&A0
Friendly Name: Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft
)
Description: USB xHCI Compliant Host Controller
Manufacturer: Generic USB xHCI Host Controller

C:\Windows\system32>

Looks like something on the USB port. Do you turn off your mouse while the system is asleep? Do you have any other devices connected beside the mouse and keyboard? It does appear to be one of your USB 3.0 ports.

This assumes, of course, the system was already awake with you ran the command.

I usually select Sleep Mode by selecting Sleep on my Keyboard. No other devices are connected except for mouse and keyboard. I do have a Printer connected but it is rarely turned on.

On Device Manager under "Universal Serial Bus Controllers" - I have found -

USB 3.0 eXtensible Host Controller - 0100 (Microsoft)

but it does not allow me the option of "turning off" whilst in Sleep Mode.

If you like, I can wait until it unexpectantely awakes from "Sleep" next time and see if its the same device.

Anything in Task Scheduler that might be causing it?

The command only appears to hold the last thing that woke it up. Checking it just after it unexpectedly wakes up is best.

Popeye, I suppose there is a possibility of a Task causing something, but it would normally be listed in the -lastwake command....

Maybe the cat is walking across the keyboard...

Saltgrass said:

The command only appears to hold the last thing that woke it up. Checking it just after it unexpectedly wakes up is best.

Popeye, I suppose there is a possibility of a Task causing something, but it would normally be listed in the -lastwake command....

Maybe the cat is walking across the keyboard...

Click to expand...

Lol, or a ghost wanting to get online. Hopefully he figures it out.

I have checked my Task Scheduler and have 45 items in it.
Some like Adobe Flash Player and Google Updater appear to trigger every 1 hour. Which one, if any, of these 45 items are waking up the computer is the unknown.

I have also repeated the above test to find which item wakes the computer -and got the same answer - - -

Instance Path: PCI\VEN_8086&DEV_8C31&SUBSYS_06221028&REV_05\3&11583659&0&A0
Friendly Name: Intel(R) USB 3.0 eXtensible Host Controller - 0100 (Microsoft


On Device Manager under "Universal Serial Bus Controllers" - I have found -
USB 3.0 eXtensible Host Controller - 0100 (Microsoft)

So what is this USB 3.0 eXtensible Host Controller - 0100 (Microsoft), can I tell it to stay asleep when instructed !!

I cannot be alone, out of the millions of Windows 8.1 users there must be others who have this problem.

A quick update - I have woken up my computer just now (on purpose), from Sleep Mode by pressing a keyboard key, and then ran powercfg -lastwake command, and I get exactly the same result !!

Do you think the keyboard is active in some way when the computer should be asleep. Its a odd sort of question to ask ??

The Keyboard is new, 6 months old if that.

I think, for testing, I would unplug all USB devices while asleep, even the printer.

You bios may have an option concerning USB and waking the computer, you might check to see if you could change such an option for testing.

Normally waking, like you seem to have, are caused by a Network Adapter or somehow through the network. Just in case it isn't a basic USB device, you might also disconnect the system from the network before you put it to sleep.

Edit: As far as the tasks go, you might check the ones you found and see if they allow waking the system. If one does then it could be responsible although I still feel it is related to some USB device.

I have checked my Task Scheduler and have 45 items in it

Click to expand...

that seems excessive ,I have none in mine
edit -none on main system, last time I looked
4 on this laptop

So very kind to help - I have added below my Task Scheduler so you can see some of the 45 items. I have not knowingly added any myself - I think most of them are Microsoft defaults-

oops I was looking in the wrong section of task scheduler, in local I have 52 actually, sorry for the miss info ,to add mine sleeps without issue

Many thanks for input, hopefully we will find the reason sometime.

I do want to rule out however the cat walking over the keyboard as suggested earlier. I only have a small budgie (peter) and he stays in his cage admiring himself in his mirror.

None of the Adobe or Google Updaters will actually wake your PC. They don't have access to that.

I agree with unplugging any USB stuff just for a test. See if it still happens. At least you'll know if it's your external hardware or not.