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.

What are other people seeing as a change rate? I seem to average around 400 mW and hour which puts all my connected standby sessions in the red. This equates to around 1% battery per hour. If you look at what is 'active' in top offenders you can see that nothing is running and all those items themselves are Green. Given others have mentioned they have connected standby sessions in the green and amber I think there might be something wrong. Interestingly I've wiped the computer using recovery tools and tested but seem to have the same issue regardless of what applications and updates are installed. See link below for the sleep study since my last reformat. http://1drv.ms/1LrjWCw

We have had the same power drain issue on our Surface Pro 3 fleet and discovered it was related to the Citrix Receiver 4.1 CU1 and 4.2. Citrix are aware of this issue and have and logged it as a bug, but are being very slow fixing the issue, even including it in the latest version of the Receiver. Citrix have provided this workaround which is working for us. http://support.citrix.com/article/CTX200347?_ga=1.205814099.1916225896.1423630939

Thanks for the reply but I'm not using Citrix and am experiencing this 400-450 mw per hour drain on a vanilla and fresh install of windows 8.1. I'm installing the bear minimum of apps I use which is office and visio and a printer driver. It sounds like most people in this thread have issues relating to Citrix, perhaps I should start a new thread?

I'm having the same issue of battery drain because of the dreaded xHCI USB (\_SB.PCI0.XHC) controller... When it started, I thought it was caused by an application I installed, so I did a full restore of the SP3. For 1 or 2 days, it seemed to be correct. The xHCI USB controller was always making the top offender list, but it was active only for 1% of the time so things were green. Then it started to be active 100% all the time in Connected Stanby... I can't identify why it started to do it again. What's worse, it is with a different set of applications as I had not re-installed that many apps yet. This thing must be driving like crazy because the SP3 case is getting noticeably hot. It basically makes Connected Standby rather worthless as it eats up the battery almost as fast as if you would be using the SP3. When you Google xHCI USB (\_SB.PCI0.XHC), a lot of hits come up with SP3 users complaining this is a battery hog. I'm hoping Microsoft is aware and actively working on this. I can't believe some Microsoft employees aren't using the SP3 and have not noticed this issue. In the meantime though, does anyone knows how to get more details of what is activating the USB controller? This thing can't decide to go crazy on its own, I assume it's activated by something. Perhaps I'm not reading the sleepstudy report correctly, but it doesn't give any clue about what is causing the USB controller it to run like this.

I've not experienced that issue before. What non modern windows apps are you installing? I generally install Office 365 Visio ResPAK Functions software Adobe Acrobat Pro None of these have caused my USB controller to max out at 100%.

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

2015-02-21T21:35:42+00:00

What are other people seeing as a change rate? I seem to average around 400 mW and hour which puts all my connected standby sessions in the red. This equates to around 1% battery per hour. If you look at what is 'active' in top offenders you can see that nothing is running and all those items themselves are Green.

Given others have mentioned they have connected standby sessions in the green and amber I think there might be something wrong.

Interestingly I've wiped the computer using recovery tools and tested but seem to have the same issue regardless of what applications and updates are installed.

See link below for the sleep study since my last reformat.

http://1drv.ms/1LrjWCw
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Anonymous

2015-02-23T22:34:11+00:00

We have had the same power drain issue on our Surface Pro 3 fleet and discovered it was related to the Citrix Receiver 4.1 CU1 and 4.2.

Citrix are aware of this issue and have and logged it as a bug, but are being very slow fixing the issue, even including it in the latest version of the Receiver.

Citrix have provided this workaround which is working for us. http://support.citrix.com/article/CTX200347?_ga=1.205814099.1916225896.1423630939
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Anonymous

2015-02-23T22:56:50+00:00

Thanks for the reply but I'm not using Citrix and am experiencing this 400-450 mw per hour drain on a vanilla and fresh install of windows 8.1.

I'm installing the bear minimum of apps I use which is office and visio and a printer driver. It sounds like most people in this thread have issues relating to Citrix, perhaps I should start a new thread?
Was this answer helpful?

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Anonymous

2015-02-25T01:52:20+00:00

I'm having the same issue of battery drain because of the dreaded xHCI USB (\_SB.PCI0.XHC) controller...

When it started, I thought it was caused by an application I installed, so I did a full restore of the SP3. For 1 or 2 days, it seemed to be correct. The xHCI USB controller was always making the top offender list, but it was active only for 1% of the time so things were green.

Then it started to be active 100% all the time in Connected Stanby... I can't identify why it started to do it again. What's worse, it is with a different set of applications as I had not re-installed that many apps yet. This thing must be driving like crazy because the SP3 case is getting noticeably hot.

It basically makes Connected Standby rather worthless as it eats up the battery almost as fast as if you would be using the SP3.

When you Google xHCI USB (\_SB.PCI0.XHC), a lot of hits come up with SP3 users complaining this is a battery hog. I'm hoping Microsoft is aware and actively working on this. I can't believe some Microsoft employees aren't using the SP3 and have not noticed this issue.

In the meantime though, does anyone knows how to get more details of what is activating the USB controller? This thing can't decide to go crazy on its own, I assume it's activated by something. Perhaps I'm not reading the sleepstudy report correctly, but it doesn't give any clue about what is causing the USB controller it to run like this.
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Anonymous

2015-02-25T02:47:39+00:00
I've not experienced that issue before. What non modern windows apps are you installing?

I generally install
- Office 365
- Visio
- ResPAK Functions software
- Adobe Acrobat Pro
None of these have caused my USB controller to max out at 100%.
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