How to enable sleep/standby on Windows Server 2012 Hyper V

Question

I know it's possible because sleep works in HyperV under Windows 8.

edit: I know this is probably not "supported".

I'm curious what the use case is for sleeping a hyper-v server. — ErnieTheGeek, Sep 21 '12 at 13:18
I'm running Server 2012 (without Hyper-V installed though), and the only place I see a sleep option is on the shutdown menu accessible via Alt+F4 from the desktop. Via the regular shutdown menu (in the charms bar or whatever it's called), I only have Shutdown and Restart. — Chris McKeown, Sep 21 '12 at 13:26
I'm interested in the downvotes. Is saving energy not a key reason for virtualisation? Or is asking the 'impossible' poorly regarded? — Fowl, Sep 22 '12 at 01:09
I didn't downvote, but: 1. Lack of evidence of research (even as little as "I found a link to where it's "not supported" 2. Making unsupported assumptions about two different products being the same. 3. Something well outside "normal" for a professional environment; it's usually a good idea to add a sentence about why you're creating an unsupported, odd-ball configuration. — Chris S, Aug 13 '13 at 13:18

Michael Hampton · Accepted Answer · 2012-09-21T13:55:51.203

12

On the server version of Windows, you can't. Once the Hyper-V role loads, hibernate and sleep are disabled.

You can sleep on Windows 8 Hyper-V because it is "Client Hyper-V" in which sleep states remain enabled. (Windows IT Pro has a list of differences between Server and Client Hyper-V, and this appears among them.)

If you really need Hyper-V installed but still want to enable sleep/hibernate selectively, a workaround is available which will disable the Hyper-V role from loading. When it's not loaded, you can put the machine to sleep/hibernate it. You need to reboot after applying these registry keys.

Gain hibernation/sleep - lose Hyper-V:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\hvboot]
"Start"=dword:00000003
Lose hibernation/sleep - gain Hyper-V:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\hvboot]
"Start"=dword:00000000

edited Sep 21 '12 at 13:55

answered Sep 21 '12 at 12:55

Michael Hampton

247,473

1

Thanks but this is the best answer for Windows Server 2008 R2 and earlier, not Windows Server 2012. HyperV now supports sleep I just need to figure out how to enable it on Server. – Fowl Sep 21 '12 at 13:19
What makes you think Microsoft changed their mind on this? – Michael Hampton Sep 21 '12 at 13:23
I don't think it's a case of "changed their mind" more as a "implemented the feature". Docs are here: http://technet.microsoft.com/en-us/library/hh857623.aspx – Fowl Sep 21 '12 at 13:24
You have to use Windows 8 for that. – Michael Hampton Sep 21 '12 at 13:25
It's the same binaries, just different configuration. – Fowl Sep 21 '12 at 13:27
Well, you have your answer. I'm sorry you don't like it, but that doesn't make it wrong. – Michael Hampton Sep 21 '12 at 13:27
1

@Fowl, the binaries for Hyper-V in Win8 and Server2012 are not the same. I couldn't enumerate every difference, but there definitely are differences. – Chris S Sep 21 '12 at 13:51
2

@ChrisS Sleep is supported for Windows server 2012 – oleksii Aug 13 '13 at 11:40
@oleksii Maybe you mean to direct that toward someone else? I never said anything about sleep support. – Chris S Aug 13 '13 at 13:15
@ChrisS sorry, that's right :) I asked a new question as the solution described in this answer doesn't work for me. Thanks. – oleksii Aug 13 '13 at 14:45
@oleksii The documentation you linked to is still wrong. Expect MS to correct it soon. – Michael Hampton Aug 13 '13 at 14:46
@MichaelHampton cheers, I will wait until Win Server 2012 R2 RTM version is available and perform an upgrade. – oleksii Aug 13 '13 at 14:59

score 1 · Answer 2 · answered Sep 24 '12 at 05:40

1

There are a variety of features in Hyper-V that don't work when you sleep the host machine. Most of them, like SR-IOV networking, revolve around the use of an I/O MMU. Client (Windows 8) Hyper-V doesn't support an I/O MMU, so it can sleep.

answered Sep 24 '12 at 05:40

Jake Oshins

5,176

How to enable sleep/standby on Windows Server 2012 Hyper V

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