Solved Power Consumption With Hybrid Shutdown?

[gator2013]

Does a laptop on battery consume any power with hybrid shutdown? Considering the Windows 8.1 Fast Boot Enabled/Hybrid Shutdown feature.

I was rather surprised to see the significant battery power drain during sleep as referenced in the attached article but I can't seem to get a definitive answer regarding the Hybrid Shutdown state.

How Much Battery Life Does Sleep Mode Really Drain?

 

[rado84]

Sleep and hybernation are not meant for laptops because during suspension and/or sleep the computer still uses power, altough you can't see or hear it doing that. Sleep and hybrid shutdown are practically the same thing. When you hybrid shutdown Windows 8 it's only being suspended which is exactly the same as sleep mode. That's why it's using power.
In order to save power you need to turn off hybrid shut down. Look here about how to disable it: How to Disable Hybrid Boot and Shutdown in Windows 8
I could show you the same thing but my Windows is entirely in Bulgarian and you wouldn't understand anything.

 

[gator2013]

I could show you the same thing but my Windows is entirely in Bulgarian and you wouldn't understand anything.

That's funny, but you're right, it would all look greek to me. No problem though as I know the process well. Actually, the hybrid shutdown is a variant of hibernate and sleep, a little of both and I think theoretically consumes much less power than hibernate or sleep but concerning laptops on battery I think it interesting that potential battery drain with the hybrid shutdown it is not really addressed anywhere or at least no where that I have seen.

Thanks for your reply.

 

[pbcopter]

Shutting down with Fast Startup enabled does not use any battery power. It is a mode like hibernate (but not actually hibernate) where restart data is written to the hard drive. You will notice that Fast startup is not even available if hibernate is turned off.

Hybrid sleep is another matter. It does consume power and it is really a mode intended for desktops.

 

[gator2013]

Shutting down with Fast Startup enabled does not use any battery power.

That was my impression.

Thanks for your reply

 

[rado84]

Fast Startup (...) is a mode like hibernate where restart data is written to the hard drive.

And in order to keep that data alive guess what's needed. Power. Which is why it drains power, altough it's a lot less than when in desktop mode.

 

[pbcopter]

Fast Startup (...) is a mode like hibernate where restart data is written to the hard drive.

And in order to keep that data alive guess what's needed. Power. Which is why it drains power, altough it's a lot less than when in desktop mode.

No, during shutdown it writes data to the hard drive then all power is removed.

 

[rado84]

Copter, it's quite clear to me you have no idea what you're talking about.
There's an easy way to prove you wrong: put your computer (note that I say computer, not a laptop) to sleep or Hybrid Shutdown. When it appears to be off, remove your power cabble to simulate power loss for a few seconds then put it back and press the power button to attempt to wake it up/turn it on. First, you'll see your HDD led is on and not twinkling. You'll only get black screen with nothing on it. Then press the reset button and you'll get a pre-OS screen asking you to delete saved data from the disk. When you press Enter you'll get a normal startup.

 

[gator2013]

No, during shutdown it writes data to the hard drive then all power is removed.

I believe that is what happens as well and that writing to the HDD is what is happening in the seconds during the hybrid shutdown process before the lights go out. But I have yet to find hybrid shutdown = zero power consumption when on battery documented in any technical material.

 

[rado84]

I don't trust any documentation but my experience. So far I found out not everything is what it looks or sounds like on paper.

 

[gator2013]

OK, Here is my little experiment:

With my LP plugged in and Fast Start-up/Hybrid Shutdown enabled I shut it down (Hybrid Shutdown). I disconnected the power/charger cable then pulled the battery for a while, reinstalled battery, reconnected power/charger cable and hit the power button. Laptop went to fast start-up without any prompts just like it does if it was never disconnected from a power source. This would tell me that the hybrid shutdown results in no power consumption. Even though my laptop was void of any power source it restarted immediately just as it does when left on a power source. I may have answered my initial question but I don't have any technical data to document it.

 

[popeye]

I dumped hybrid power down some time back. For me it was causing too many crashes/bluescreens after reboot and sometimes corruption. Since I have relied on fastboot only, no more such problems. Seems to boot just as quickly. My experience, yours may differ.

 

[pbcopter]

Copter, it's quite clear to me you have no idea what you're talking about.
There's an easy way to prove you wrong: put your computer (note that I say computer, not a laptop) to sleep or Hybrid Shutdown. When it appears to be off, remove your power cabble to simulate power loss for a few seconds then put it back and press the power button to attempt to wake it up/turn it on. First, you'll see your HDD led is on and not twinkling. You'll only get black screen with nothing on it. Then press the reset button and you'll get a pre-OS screen asking you to delete saved data from the disk. When you press Enter you'll get a normal startup.

You can believe what you want but I stand by what I have said and I know what I am talking about thank you.

 

[gator2013]

I dumped hybrid power down some time back. For me it was causing too many crashes/bluescreens after reboot and sometimes corruption. Since I have relied on fastboot only, no more such problems. Seems to boot just as quickly. My experience, yours may differ.

Fast Start (Fast Boot) shuts down the computer in a hybrid fashion, that's why it starts faster than from a full shutdown. It's not hibernate and it's not sleep but a little bit of both. With Fast Start enabled you get the hybrid (variant) shutdown whether you want it or not.

From Microsoft: https://msdn.microsoft.com/en-us/library/windows/hardware/jj835779(v=vs.85).aspx

"To prepare for a fast startup, Windows performs a hybrid shutdown sequence that combines elements of a full shutdown sequence and a prepare-for-hibernation sequence."

From all that I have read as well as my little experiment I think there is more reason than not to believe that with Fast Start enabled there is zero power consumption of a laptop on battery after shutdown. But sleep is a totally different matter.

I am marking this thread as solved but additional comments are welcome.

 

[popeye]

I really meant "hibernate" where I said "hybrid" but it all is a bit of smoke and mirrors IMO. If the OS is optimized for a fast start up I'm not sure any of these settings are that much better than a cold start.

 

[pbcopter]

This tutorial contains a good explanation of Fast Startup.

http://www.eightforums.com/tutorials/6320-fast-startup-turn-off-windows-8-a.html

 

[gator2013]

If the OS is optimized for a fast start up I'm not sure any of these settings are that much better than a cold start.

I tend to agree with you there. On my PC's, especially my desktop there is not a whole lot of difference between the Fast Start and Cold Start. I have never timed it but it just doesn't seem that much different, possibly a matter of seconds. Big Deal

 

[CountMike]

Fast starting = SSD