I'm interested to know what other users tend to see when running the "powercfg /sleepstudy" tool on their Surface Pro 3s (as per http://blogs.windows.com/windows/b/windowsexperience/archive/2014/06/26/sleep-study-diagnose-what-s-draining-your-battery-while-the-system-sleeps.aspx ). I'm finding that all my "InstantGo" sessions have a drain rate of between 1200 and 2200mW, which can correspond to between 10% and 20% of the battery drain in the 4 hours before the machine hibernates. Looking at the culprits, almost all the sessions show the following device running for the entire "sleep" period: USB xHCI Compliant Host Controller (\_SB.PCI0.XHC) Fx Device 100% 4:00:00 Is this expected? FWIW, I tend to leave the keyboard cover connected during sleep. Sometimes (when the drain is at the high end of the range), I also see the following: Intel(R) HD Graphics Family (\_SB.PCI0.GFX0) Fx Device 100% 4:00:00 Interestingly, during the first few days I had the SP3, the graphics driver was appearing in every session of the sleep study report. More recently, though, it has stopped appearing. Recently I've been leaving the Surface at the start screen rather than the Desktop, so this may be related - is there a recommendation about coming out of the Desktop before going to "sleep" I also never see anything in the "DRIPS histogram" - should I? What are other people seeing? On a related note, does anyone know if there is a way of changing the time before the machine hibernates? For me, 2 hours (or even 1 hour) would probably be fine - if I'm actively going from one office to another, then the "instant" resume is great, but if I'm at home, leaving the machine for a while, then 4 hours is overkill.

Wow, I'm not sure if our team lead on our SP3 tablet rollout is aware of that!! I'll definitely pass this on (re: when the screen is off the machine is asleep). Perhaps this is all part of the new InstantGo feature.....and likely this is documented but just something I missed. So, my thoughts are: should we adjust our GPOs which control our power management accordingly? - is there even a need for a GPO that is responsible to "Turn off the display" after x minutes when that would be redundant since we also have a "...system sleep timeout" GP. Do you know if your IT dept. uses GPOs to configure their Power Management? I'd be interested in picking their brains on a few issues...

I know what you mean about the reading of 2835052, but the issues with Windows tablets (I've seen this on both the SP3 and a Dell Venue Pro) is that the power options for the "monitor" affect the entire PC. In other words, when the "screen" is off, the entire machine is asleep. Whether this is by design or accident, I don't know - all I know is that I hit issues where, for example, I'd send an email in Outlook then immediately lock my SP3 (e.g. Windows key + L). I have a 1 minute Outbox delay set up in Outlook (to avoid those "oh no - did I really just press send" moments) and I'd find that before my minute was up, the SP3 would go from locked to asleep meaning my email didn't get sent until I woke the machine up again (I timed it, and sleep would kick in after around 31s of lockscreen). The change in 2835052 sorted me out - I set the limit to 1 hour, which means I no longer get emails stuck in the Outbox; it also means that other jobs that I might be running don't get put to sleep after 30s! In terms of the hibernate after 4 hours, I've checked with my IT department - they run the commands in https://support.microsoft.com/en-us/kb/2998588 as part of their deployment of Win 8.1 Enterprise.

no need to apologise eepyaich That is definitely helpful. I was hoping that yourself or another MS community member had found a solution for both scenarios. I left my SP3 tablet on battery last night and that did not work.... came in this morning and it woke from Connected standby and not "hibernate". This is the first time I've read KB2835052 article but my understanding of https://support.microsoft.com/en-gb/kb/2835052 is that this simply controls the monitor and doesn't actual put the tablet to sleep. Also this article is indicating that it applies to Windows 8 and not Windows 8.1.... In case you were not aware one can confirm whether the tablet is actually going into sleep mode by looking in Event Viewer (System) ...I believe Kernel Power (Event 42) is an indicator of the tablet going to sleep....but it sounds like maybe you are not part of the IT dept. where you work.... anyway, cheers....we'll be looking deeper into our issues here. It may be GPO related. S

Just to be clear, are you talking about the machine going from connected standby to hibernate after 4 hours on battery, or just hibernating after 4 hours of unattended use even if on AC power? If the former, then it "just worked" for me (although I could believe that my IT department have followed the instructions in the blog you linked). If you're talking about the latter, then that isn't what I have. If the machine is docked on power, then I have it set to go to sleep after an hour of no use (where I needed to use some of the information in https://support.microsoft.com/en-gb/kb/2835052 to make sure that it did last an entire hour before sleeping when locked - the default seemed to be sleep after 30s when locked). When left on power, though, it doesn't hibernate at all - it'll stay in sleep until I come in next morning. Sorry I can't be more helpful.

To Eepyaich.... I'm having problems getting my SP3 with Win8.1 Enterprise to hibernate... you wrote: "Personally, I've not had problems with the 4 hour transition to hibernate" we deploy Win8.1 to Surface Pro 3 using LiteTouch (MDT 2013) deployment we're using Group Policies (Balanced scheme) along with the following settings : Specify the unattended hibernate timeout (4 hrs) for both AC and DC the setting shows up in my registry as expected: HKLM\Software\Policies\Microsoft\Power\PowerSettings\9D7815A6-7EE4-497E-8888-515A05F02364 But my SP3 will not Hibernate after 4 hours of idle. Further searches took me to the link for "Surface Pro 3 Hibernation Doesn’t Occur on Enterprise Install" ( http://blogs.technet.com/b/askcore/archive/2014/11/05/surface-pro-3-hibernation-doesn-t-occur-on-enterprise-install.aspx ) but my understanding is that this batch file is to do with transitions from one state to another (in other words when you go from the "connected" standby to hibernate and when to hibernate based on low battery level). is for Battery So what did you do to get the 4 hr to Hibernate?

What should "sleepstudy" show for a Surface Pro 3

Anonymous

I'm interested to know what other users tend to see when running the "powercfg /sleepstudy" tool on their Surface Pro 3s (as per http://blogs.windows.com/windows/b/windowsexperience/archive/2014/06/26/sleep-study-diagnose-what-s-draining-your-battery-while-the-system-sleeps.aspx).

I'm finding that all my "InstantGo" sessions have a drain rate of between 1200 and 2200mW, which can correspond to between 10% and 20% of the battery drain in the 4 hours before the machine hibernates.

Looking at the culprits, almost all the sessions show the following device running for the entire "sleep" period:

USB xHCI Compliant Host Controller (\_SB.PCI0.XHC)	Fx Device	100%	4:00:00

Is this expected? FWIW, I tend to leave the keyboard cover connected during sleep.

Sometimes (when the drain is at the high end of the range), I also see the following:

Intel(R) HD Graphics Family (\_SB.PCI0.GFX0)	Fx Device	100%	4:00:00

Interestingly, during the first few days I had the SP3, the graphics driver was appearing in every session of the sleep study report. More recently, though, it has stopped appearing. Recently I've been leaving the Surface at the start screen rather than the Desktop, so this may be related - is there a recommendation about coming out of the Desktop before going to "sleep"

I also never see anything in the "DRIPS histogram" - should I?

What are other people seeing?

On a related note, does anyone know if there is a way of changing the time before the machine hibernates? For me, 2 hours (or even 1 hour) would probably be fine - if I'm actively going from one office to another, then the "instant" resume is great, but if I'm at home, leaving the machine for a while, then 4 hours is overkill.

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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82 answers

Anonymous

2015-05-15T15:49:25+00:00
Wow, I'm not sure if our team lead on our SP3 tablet rollout is aware of that!! I'll definitely pass this on (re: when the screen is off the machine is asleep). Perhaps this is all part of the new InstantGo feature.....and likely this is documented but just something I missed.

So, my thoughts are:
- should we adjust our GPOs which control our power management accordingly?
- is there even a need for a GPO that is responsible to "Turn off the display" after x minutes when that would be redundant since we also have a "...system sleep timeout" GP.

Do you know if your IT dept. uses GPOs to configure their Power Management?

I'd be interested in picking their brains on a few issues...
Was this answer helpful?

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Anonymous

2015-05-14T16:26:15+00:00

I know what you mean about the reading of 2835052, but the issues with Windows tablets (I've seen this on both the SP3 and a Dell Venue Pro) is that the power options for the "monitor" affect the entire PC. In other words, when the "screen" is off, the entire machine is asleep.

Whether this is by design or accident, I don't know - all I know is that I hit issues where, for example, I'd send an email in Outlook then immediately lock my SP3 (e.g. Windows key + L). I have a 1 minute Outbox delay set up in Outlook (to avoid those "oh no - did I really just press send" moments) and I'd find that before my minute was up, the SP3 would go from locked to asleep meaning my email didn't get sent until I woke the machine up again (I timed it, and sleep would kick in after around 31s of lockscreen).

The change in 2835052 sorted me out - I set the limit to 1 hour, which means I no longer get emails stuck in the Outbox; it also means that other jobs that I might be running don't get put to sleep after 30s!

In terms of the hibernate after 4 hours, I've checked with my IT department - they run the commands in

https://support.microsoft.com/en-us/kb/2998588 as part of their deployment of Win 8.1 Enterprise.
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Anonymous

2015-05-14T15:39:34+00:00

no need to apologise eepyaich That is definitely helpful.

I was hoping that yourself or another MS community member had found a solution for both scenarios. I left my SP3 tablet on battery last night and that did not work.... came in this morning and it woke from Connected standby and not "hibernate".

This is the first time I've read KB2835052 article but my understanding of https://support.microsoft.com/en-gb/kb/2835052 is that this simply controls the monitor and doesn't actual put the tablet to sleep. Also this article is indicating that it applies to Windows 8 and not Windows 8.1....

In case you were not aware one can confirm whether the tablet is actually going into sleep mode by looking in Event Viewer (System) ...I believe Kernel Power (Event 42) is an indicator of the tablet going to sleep....but it sounds like maybe you are not part of the IT dept. where you work....

anyway, cheers....we'll be looking deeper into our issues here. It may be GPO related.

S
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Anonymous

2015-05-14T11:13:46+00:00

Just to be clear, are you talking about the machine going from connected standby to hibernate after 4 hours on battery, or just hibernating after 4 hours of unattended use even if on AC power?

If the former, then it "just worked" for me (although I could believe that my IT department have followed the instructions in the blog you linked).

If you're talking about the latter, then that isn't what I have. If the machine is docked on power, then I have it set to go to sleep after an hour of no use (where I needed to use some of the information in https://support.microsoft.com/en-gb/kb/2835052 to make sure that it did last an entire hour before sleeping when locked - the default seemed to be sleep after 30s when locked). When left on power, though, it doesn't hibernate at all - it'll stay in sleep until I come in next morning.

Sorry I can't be more helpful.
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Anonymous

2015-05-13T19:28:51+00:00
To Eepyaich....

I'm having problems getting my SP3 with Win8.1 Enterprise to hibernate...

you wrote: "Personally, I've not had problems with the 4 hour transition to hibernate"
- we deploy Win8.1 to Surface Pro 3 using LiteTouch (MDT 2013) deployment
- we're using Group Policies (Balanced scheme) along with the following settings
: Specify the unattended hibernate timeout (4 hrs) for both AC and DC
- the setting shows up in my registry as expected:
HKLM\Software\Policies\Microsoft\Power\PowerSettings\9D7815A6-7EE4-497E-8888-515A05F02364

But my SP3 will not Hibernate after 4 hours of idle.

Further searches took me to the link for "Surface Pro 3 Hibernation Doesn’t Occur on Enterprise Install" (http://blogs.technet.com/b/askcore/archive/2014/11/05/surface-pro-3-hibernation-doesn-t-occur-on-enterprise-install.aspx) but my understanding is that this batch file is to do with transitions from one state to another (in other words when you go from the "connected" standby to hibernate and when to hibernate based on low battery level). is for Battery

So what did you do to get the 4 hr to Hibernate?
Was this answer helpful?

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