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.

JamieY, I am having a drain problem when my SP3 is sleeping. I do have Cisco Anyconnect installed but not running when sleeping. Do you mean to say that even if it is installed yet not running, this still drains battery? Thanks!

Bad news. Once I actually used Skype (make a video call), in the next sleep I got the familiar red thing .. I guess it is not fixed.

My Skype is still at 6.21.0.104 and says its the latest - how did you get an updated version? I had an upgrade notification when I turn on Skype - I think they roll it out sequentially if you haven't gotten that. But unfortunately the upgrade failed, so I ended up just uninstalling Skype, and I downloaded Skype desktop installer from their website and installed it without any problem. I believe you could do that too. I just checked again with 1+ hour sleep in the morning and the sleepstudy showed all green. So far I have just let skype run and never did a video chat or anything, so I will try to actually use skype and then see what happens.

It seems it is fixed - in three connected standby tries, having Skype running did not cause the familiar red xHCI hub in sleepstudy. That's good news... Now if we only knew how Skype had fixed it, then the people who write my VoIP softclient (which causes the same behaviour) could make the same fix! [Full disclosure, the VoIP client is actually written by my company, so I'm in a good place to get them to fix it, if I knew what the fix was!] My Skype is still at 6.21.0.104 and says its the latest - how did you get an updated version? Ed

It seems it is fixed - in three connected standby tries, having Skype running did not cause the familiar red xHCI hub in sleepstudy.

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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Anonymous

2014-12-01T04:03:39+00:00

JamieY,

I am having a drain problem when my SP3 is sleeping. I do have Cisco Anyconnect installed but not running when sleeping. Do you mean to say that even if it is installed yet not running, this still drains battery?

Thanks!
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Anonymous

2014-11-21T17:58:13+00:00

Bad news. Once I actually used Skype (make a video call), in the next sleep I got the familiar red thing .. I guess it is not fixed.
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Anonymous

2014-11-20T16:41:56+00:00

My Skype is still at 6.21.0.104 and says its the latest - how did you get an updated version?

I had an upgrade notification when I turn on Skype - I think they roll it out sequentially if you haven't gotten that. But unfortunately the upgrade failed, so I ended up just uninstalling Skype, and I downloaded Skype desktop installer from their website and installed it without any problem. I believe you could do that too.

I just checked again with 1+ hour sleep in the morning and the sleepstudy showed all green. So far I have just let skype run and never did a video chat or anything, so I will try to actually use skype and then see what happens.
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Anonymous

2014-11-20T09:32:30+00:00

It seems it is fixed - in three connected standby tries, having Skype running did not cause the familiar red xHCI hub in sleepstudy.

That's good news...

Now if we only knew how Skype had fixed it, then the people who write my VoIP softclient (which causes the same behaviour) could make the same fix! [Full disclosure, the VoIP client is actually written by my company, so I'm in a good place to get them to fix it, if I knew what the fix was!]

My Skype is still at 6.21.0.104 and says its the latest - how did you get an updated version?

Ed
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Anonymous

2014-11-20T05:23:39+00:00

It seems it is fixed - in three connected standby tries, having Skype running did not cause the familiar red xHCI hub in sleepstudy.
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