PC reboots automatically after sleep or hibernate

FusionGFX

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Dec 18, 2015
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Dear forum!

If I want to set my PC to hibernate or sleep, all the fans stop spinning and the lights go out as intended. But after one or two seconds, the system starts waking up again on its own.
I did try to play with the power saving settings but nothing worked..

What can I do to fix this issue?

System:
- Intel Core i7 5820k
- NVIDIA GeForce GTX 980 ASUS STRIX
- Corsair Vengeance 16 GB DDR4 2666 MHz (OC 3000 MHz)
- ASUS X99-A USB 3.1
- Samsung 850 500 GB SSD

OS: Windows 10


Regards, Thomas
 
Solution
You own a PC. Hibernate is part of Windows designed for laptops, and since you don't have to worry about saving the battery on a pc, you can remove hibernate and just use sleep mode.
http://www.sevenforums.com/tutorials/819-hibernate-enable-disable.html

One thing you'll need to know when using sleep is your psu. There's the newer dc-to-dc type digital psus, and the older group regulated kind. Both can be excellent units, but group regulated psus have an issue with Haswell or newer cpus dropping into sleep states (C states) below C3, that's the really deep sleep where most things are shut down. Basically the voltage needed by the cpu is too low so it won't wake up after a little while sleeping. Sleep states below C3 can be turned of in...
For any power related settings, to do with sleep, hibernation mode and system wake up and resume.

All of the main settings should be set in the bios of the motherboard you have.

The first setting in the bios is to make sure that the Acpi option is enabled.
And the sleep or suspend mode combination is correctly chosen.
Also that the Hpet option is enabled.

For the S state modes S1 / S3 should be selected.
WoL can be set to disabled if you intend the system to be shut down or put into sleep mode via use of WaN connection control.

The settings for asus boards can be found by making sure advanced mode in the bios is selected.

Once you have changed what you need to in the bios settings of the motherboard, save them before exiting the bios.


The next part if you wish is to create a custom power plan, or simply set the power plan for your system to High performance.

 
You own a PC. Hibernate is part of Windows designed for laptops, and since you don't have to worry about saving the battery on a pc, you can remove hibernate and just use sleep mode.
http://www.sevenforums.com/tutorials/819-hibernate-enable-disable.html

One thing you'll need to know when using sleep is your psu. There's the newer dc-to-dc type digital psus, and the older group regulated kind. Both can be excellent units, but group regulated psus have an issue with Haswell or newer cpus dropping into sleep states (C states) below C3, that's the really deep sleep where most things are shut down. Basically the voltage needed by the cpu is too low so it won't wake up after a little while sleeping. Sleep states below C3 can be turned of in either windows power or bios.

Here's the kicker. You own a PC, not a laptop. Shutting down everything from lights to fans etc really isn't possible or advised. The cpu is always active, it's what allows the pc to recognize things like LAN or USB awakening. Means also, that any heat generated, even at idle, is not vacated from the case.

Pretty much if you want such low power states where nothing works, just shut the pc down
 
Solution



Thanks for that useful answer! That porbably explains it. By the way I own a Corsair RM750i PSU. :)
 


Thanks a lot, ill take a look into that :)
 


so the issue is the constant activity since the CPU never goes to sleep at all and produces heat etc..?
 
Yep. The human brain is still very active, even when the body is asleep, we call it dreaming, body repairing, breathing etc. Pc is no different. Even when the monitor shows nothing, the pc is still active, still having background tasks, indexing, translating net code, Antivirus checks on incoming net data, waiting on signals from the mouse to wake up.... To you, the pc is in sleep mode, to the pc, it's still on, just in a different state of on. If 'wake on LAN' is enabled, it'll never power down, that activity is constant. Unless Antivirus and indexing and all other activity is regulated to background, it'll keep a pc wide awake, even if the monitor is powered down. Even after being asleep for days, that little blue hdd/power led is still constantly goin nuts on my pc.

The only way to fully power down a pc is exactly that. Manual shut down.
 

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