Why is resume from hybrid sleep (after power removed) so much slower than resuming from hibernate (also after power removed)?

Question

On all Windows 7 systems I've tried, I find that resuming from the default (desktop config) hybrid sleep when the power has been switched off, takes much longer than if the machine is put into hibernate (using shutdown /h) and powered off. I wouldn't expect there to be any noticable difference, but in practice I find it's fairly substantial.

Resuming from hibernate takes < 1 min, while resuming from a powered off hybrid sleep takes several minutes before the machine is responsive.

Resuming from hybrid sleep when the power hasn't been removed is really fast - just a few seconds.

I don't have a problem as such, I'm just wondering if there's some bug/implementation quirk in the hybrid sleep resumption that makes it so much slower than the hibernate, or if it's just an inherent aspect of hybrid sleep power resumption.

Answer 1

No, I'm afraid that's not answered the question I asked at all. I already know what they are, and if the answer to my question was in FAQ I'd have already found it.

Answer 2

The   Power Troubleshooter just changed the timeout values for turning off the monitor, the harddrive, enabled screen saver and similar. Not sure how this helps.

Answer 3

Same problem for me.

I also noticed that some programs get "not responding" (firefox, for example) for some time after resuming from hybrid sleep after a power failure.

Answer 4

Actually, I have this question, too.

It looks like both them spend the same time when you can see "Resume Windows" logo.

You can see desktop < 1min when you resume from hibernate.

But it will spend more than 2min until you can see desktop when you resume from hybrid sleep after power off.

Is it possible driver's issue?

Answer 5

HiDavid Lowndes,

Hybrid sleep is designed primarily for desktop computers. Hybrid sleep is a combination of sleep and hibernate it puts any open documents and programs in memory and on your hard disk, and then puts your computer into a low-power state so that you can quickly resume your work. That way, if a power failure occurs, Windows can restore your work from your hard disk. When hybrid sleep is turned on, putting your computer into sleep automatically puts your computer into hybrid sleep. Hybrid sleep is typically turned on by default on desktop computers.

Hibernation is a power-saving state designed primarily for laptops. While sleep puts your work and settings in memory and draws a small amount of power, hibernation puts your open documents and programs on your hard disk, and then turns off your computer. Of all the power-saving states in Windows, hibernation uses the least amount of power. On a laptop, use hibernation when you know that you won't use your laptop for an extended period and won't have an opportunity to charge the battery during that time.

Sleep and hibernation: frequently asked questions

**http://windows.microsoft.com/en-us/windows7/Sleep-and-hibernation-frequently-asked-questions**

Hope this helps!

Halima S   - Microsoft Support.

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