In my last post, I introduced you to InstantGo (previous to Windows 8.1, we called this Connected Standby), a new power model used on some Windows 8.x systems. InstantGo is a tight integration of software (firmware, drivers, OS) with System on Chip (“SoC”) hardware to provide a sleep mode with long battery life and a connected, instant-on user experience.
In this post, I’d like to introduce you to Sleep Study, a new tool available on Windows 8.x systems with InstantGo that can help you identify sources of battery drain that occurred while the PC was in sleep mode (that is, when the screen was off).
Sleep Study tells you how well the system slept and how much activity it experienced during that time. While in the sleep state, the system is still doing some work, albeit at a lower frequency. Because the resulting battery drain is not easily perceptible (you can’t see it draining), we built the Sleep Study tool in Windows 8.1 to allow you to track what is happening. We thought of simply using traditional logging to do this, but ironically, the logging itself would drain the battery. With this in mind, we designed the Sleep Study tool to minimize its own impact on battery life, while tracking the battery draining activities.
The Sleep Study report
You can use Sleep Study to see which apps and devices are most active during a sleep session. Sleep Study reviews all the sleep sessions longer than 10 minutes and provides you with a report that color codes each session according to its power consumption. A session is defined as the period from Screen Off to Screen On. In cases when the system is plugged into AC power, the policies are less stringent than when on battery power. While the tool still tracks connected standby activity on AC power, it is more useful to identify unexpected drains on battery, or DC power.
To help you easily identify apps, devices and services with higher power consumption, these are highlighted in red or orange in the report, and represent opportunities to extend your battery life.
In this video, we walk you through a typical Sleep Study report.
Determining if you have InstantGo support
Sleep Study is a Windows 8.1 utility that only runs on systems that support InstantGo. You can determine if your hardware and software support InstantGo by entering powercfg /a into a Command Prompt window, and then looking to see if Standby (Connected)is included in the list of sleep states:
Running Sleep Study
The Sleep Study tool is an option passed to powercfg. You need to run it from an elevated cmd window to have it generate a sleepstudy-report.html in the current directory. In summary, the requirements for running Sleep Study are:
- Admin rights
- Windows 8.1 or newer system
- InstantGo support
Note that in this example, I created “C:temp” in advance so a non-admin user would be able to open the resulting sleepstudy-report.html in a browser.
Loading the HTML report
The Sleep Study HTML output, sleepstudy-report.html, can be loaded in any browser.
The HTML is created in the current directory. We recommend you run the command in a non-system directory. For example, instead of the default c:windowssystem32, use a non-system directory such as c:temp. This step is recommended, but optional if you’re an admin. Keep in mind that non-admin users won’t be able to access the report unless it is in a non-system directory.
Sections within the report
The Sleep Study HTML output is designed so you can easily read and interpret it. The sections are:
- Machine information
- Battery drain chart
- Chart Legend
- Connected standby session summary table
- Connected standby session 1
- Session #1 summary
- Top 5 duration activities
- Detailed breakdown of sub components
- Connected standby session 2
- (Repeat for each subsequent session).
- Battery information
Next, I’ll go through each section in detail.
Machine information
Note the report time: Sleep Study will look back up to 3 days for connected standby sessions. You can use “powercfg /sleepstudy /?” to see additional command line options.
Battery drain chart
- Green lines are well performing sessions
- Orange lines are moderate performing sessions
- Red lines are poor performing sessions
- Dotted Lines are on AC (wall charger)
- Solid lines are on DC (battery)
Connected standby session summary table
- Sessions are numbered sequentially
- START TIME is in YYYY-MM-DD HH:MM:SS, using 24-hour format
- State is a hyperlink to the session, in this case, all connected standby sessions
- DURATION is in HH:MM:SS. Durations under 10 minutes are filtered out of this report
- ENERGY CHANGE is in milli-watts per hour and as % of battery capacity
- CHANGE RATE is in mW over an hour interval
- “Charge/Drain” determines if it was an AC or DC session. Drain is DC; Charge is AC.
- % LOW POWER STATE TIME is the % of time spent in Deepest Runtime Idle Platform State (DRIPS %)
- Some systems may also have an analogous hardware state for DRIPS %
Per session details
- Per Session Summary repeats the above vital statistics.
- The top 5 offenders are listed in terms of duration.
- Detailed information on:
- Activator (Software component)
- Device (hardware component)
- PDC phases (connected standby system activity)
- Networking (In depth breakdown of networking durations by NDIS clients)
- Histogram of duration between CPU wake periods
- Periods of 32 seconds or longer are optimal for battery savings
Advanced statistics are displayed by clicking the three dots in the rightmost gray box. The statistics shown in the resulting list vary according to system capabilities.
High-drain sleep sessions
Some connected standby sessions are expected to have activity that results in battery drain. Examples where we expect higher than average drain include:
- Getting and installing Windows Update while the system sleeps
- Having peripherals plugged into the USB port (hubs, disks, keyboards, mice, network adapters)
- Having Bluetooth connected devices while the screen is off
- Playing music with the screen off
- Poor WLAN environment or unreliable network connections
- High network activity (Skype calls, emails, downloads)
- Short sleep sessions that don’t allow the system to settle into idle
- Having a poorly behaving device driver
- Other low-level software bugs in drivers, firmware, or system services
We allow the system to support the experiences you care about, but with the Sleep Study tool, now you can better understand the associated battery drain. You can then make an informed decision around battery costs of certain activities. Of course, it’s also a relatively user friendly tool you can use to isolate any unexpected battery drains.
Battery information
- DESIGN CAPACITY tells you the size of the battery, in this case close to 30.5 watt hours (or 30,488 milliwatt hours)
- CAPACITY RATIO tells you how much energy can be stored in the battery before it is considered full.
- If low, the battery will have shorter battery life due to reduced capacity (for example, if the battery chemistry degrades)
- Drain rates are based on percentage of (Design Capacity * Capacity Ratio)
Additional Sleep Study options:
Here are a few additional options available to you:
Sleep Study is a very useful tool to track your battery drain while in sleep mode on an InstantGo capable system. We’ve provided this powerful visual tool to help both PC manufacturers and end users better understand the subtle ways in which different activities can affect battery life. If you try out Sleep Study on your Windows 8.1 InstantGo system, let us know how it goes!
Windows 10: Disable / Remove Windows 10 Sleep Study
Discus and support Disable / Remove Windows 10 Sleep Study in Windows 10 Customization to solve the problem; Found this :…
Discussion in ‘Windows 10 Customization’ started by marco spencer, Aug 29, 2019.
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Disable / Remove Windows 10 Sleep Study
Found this : https://answers.microsoft.com/en-us…ep-study/06b1b126-afe6-4b05-bd6e-b5536c2ae8be and can’t put an new answer cause thread are closed so here is my reply to it for all who have the same issue …
— First of all i deleted the folder Windows/System32/SleepStudy and all the files with AVG TuneUp shredder.
— Second i create a new folder with the same name and set the security options for all the types of users like SYSTEM, Administrator, User, TrustedInstaller e.t.c. to denied eg disabled so no one now can access these folder or write files into it
After these changes windows are unable to create the *.etl files and other folders in the folder SleepyStudy … so i guess ive fixed these problem
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Disable / Remove Windows 10 Sleep Study
Please tell me how I can Disable / Remove Windows 10 Sleep Study
Windows 10 incorrectly identifies my desktop as a tablet, most likely because I am using a Dell touch screen monitor. I want to disable and remove the «Sleep Study» and all components as it is an unnecessary drain on system resources. Please note, this
is a DESKTOP system with no battery, no need to monitor screen on times or sleep times. I have tried everything I can find including stopping «ScreenOnPowerStudyTraceSession» in Performance Monitor and setting output files to Read Only. Nothing works. Please
help. -
Disable / Remove Windows 10 Sleep Study
Yes, if you are able to take full control of the folders, you can completely delete the Sleep Study folder from the System 32 folder. I have done so many, many times. But that is of no real importance, because the Sleep Study folders and a new batch of
*.etl files will reappear overnight.The Sleep Study process is smart enough to create the necessary folders if they do not exist, and promptly begins filling them with more files. I would still like to find a permanent fix for this issue but to be honest, I have not spent a lot of time on
it lately. I’ve thought about adding a simple batch file to my start up that will delete the files, but that would make it difficult to know if the files were still being produced. It would remove the incentive to find a way to terminate and remove the process
that is creating the mess.I will look at it again as time permits, but if anyone actually KNOWS how to curtail the Sleep Study process, don’t be shy about sharing your success.
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Disable / Remove Windows 10 Sleep Study
Disable / Remove Windows 10 Sleep Study
Hi,
You may disable all Sleep-related settings by following these steps:
- Type Control Panel from the Cortana search bar, then choose the
Control Panel app from the best match result. - Choose the Large icons option from the View by drop-down list found on the upper-right part of the Control Panel window.
- Locate then select Power Options.
- Click the Change plan settings link beside the selected
Preferred plan. - Click Change advanced power settings.
- Locate and open all the options under Sleep.
- Turn OFF all the options that is under Sleep.
- Click the Apply button, then OK.
Let us know the result.
Regards.
- Type Control Panel from the Cortana search bar, then choose the
Disable / Remove Windows 10 Sleep Study
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A sleep state.
A Sleep Study generates a report of connected standby (aka: «InstantGo» and «Modern Standby») quality over the last three days on the system….
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Reading over traffic at TenForums, I came across a topic that pops up regularly. In Windows 10, the term “sleep” covers a number of states during which a PC reduces activity. In fact, according to the Windows Docs on System Power States, 7 such states are recognized. There are 6 ACPI power states and a “mechanical off” state (caused when a shutdown operation also turns off the PC’s power supply). “Why is sleep a regular TenForums topic?” you ask. “Good question!” Proper sleep on a Windows PC requires the right settings and drivers, one or both of which often get bollixed. And that, dear readers, is why Win10 Sleep issues make Sleepstudy worthwhile.
When it comes to most things sleep-related in Win10, the Powercfg command is a great source of information. This text block comes from the head of its Sleepstudy report.
Why Do Win10 Sleep Issues Make Sleepstudy Worthwhile?
It turns out that in Windows 10, sleep issues are best researched from the command line, using the powercfg (power configuration) command. It works with equal facility in an administrative command prompt or PowerShell session. This command covers a lot of capabilities and possibilities that I won’t get into here. Instead, I’ll recommend that those interested in learning more about this powerful and useful command (outside of sleep stuff) consult the Microsoft Docs page entitled “Powercfg command-line options.” It’s my go-to reference, too, so it comes highly recommended.
In reading over a recent tale of Win10 sleep woe, the original poster (OP) at TenForums indicated he’d tried two variants on powercfg that ended up not telling him much (or anything useful) about recent sleep activity. Those commands were
Powercfg /requests
Powercfg /lastwake
The /requests option simply enumerates application and driver Power Requests, usually to initiate or interrupt one or more of the Windows sleep states. The /lastwake option reports on what service of type of wake request caused the system to most recently wake up from a sleep state. The OP’s basic complaint was that neither of these commands was telling him anything useful. Nothing loath to try it myself, I ran those commands and saw nothing terribly useful from them either, to wit:
Upon running the cited commands, they didn’t tell me much of anything, either.
In my case, I knew /lastwake wouldn’t tell me much because I’d installed a new Start10 version earlier this morning. It requires a reboot to finish up its update process, so that meant there was no last wake-up to report. As far as the /requests option goes, I didn’t know what to expect, never having used it before. Good thing I had no expectations, because it enumerated “None” for all the various wake/sleep requests it tracks.
Where Does Sleepstudy Come Into Play?
But there’s more to Powercfg than just a bunch of individual query options. In fact, the Sleepstudy option generates an entire HTML-formatted report on system power state transitions, which include sleep, hybrid sleep, hibernation, and shutdowns. By default the report is named sleepstudy-report.html and it resides in the %windir%\System32 folder (on my — and most — Win10 PCs, that means it lives in C:\Windows\System32). You can double-click this file to open it in your default browser. All screen caps I show from this recently-produced file come from Edge.
Power State Transitions and Durations
Right away, I noticed a very useful table near the head of the Sleep Study file. Here’s what it looks like from my production PC:
Notice the various states shown of which “Standby (Hybrid)” represents a sleep state on my PC.
[Notes: I truncated the table to omit empty fields; Click image for full-sized view.]
The table is pretty easy to read. It shows start times (far left) and duration (left 2nd) for each state documented. The rhythm on my system is pretty simple and consists mostly of transitions from active [in use/awake] to standby (hybrid) [asleep], with a single reboot this morning after I’d installed the aforementioned Start10 update. Easy-peasey, right? That’s what the OP from the TF post could (and probably should) have used to get more info on recent sleep activity on his PC, too.
If you read down further into the file, you’ll see a set of “Analysis Results” for each state transition documented in the preceding table. This, too, provides useful information about what happened to get a PC into (and out of) some specific power state mentioned in the table. Overall, this is good and helpful information, well worth consulting when researching a PC’s power state transitions. Please think of it the next time you’re curious (or troubleshooting) Windows 10 sleep issues. Great stuff!
Modern standby enables the PC to turn it On and Off instantly much like smartphones, while keeping the network connected. Modern standby is also referred to as a S0 Low Power Idle sleep state, which provides this instant On/Off experience in windows.
Modern Standby (S0 Low Power Idle) keeps your computer in the lowest power mode while allowing apps to receive the latest content, such as incoming email, VoIP calls, Windows updates, etc. Your computer may enter a Modern standby state from any of the following actions:
- Pressing the system power button.
- Closes the lid of the laptop/desktop/tablet.
- Select Sleep from the power button in the Windows Start menu.
- Waits for the system to idle and enter sleep automatically, according to the Power and sleep settings.
The amount of battery saving in Modern Standby is calculated by determining the time the system spends in DRIPS (Deepest Run-time Idle Platform State). DRIPS occurs when the system is consuming the lowest amount of power possible. If any background tasks, such as receiving emails or Windows updates, consume power, the system is not considered to be in DRIPS mode.
Total Modern Standby session time = DRIPS time + non-DRIPS time
As S0 Low Power Idle will remain connected to the network even in low power mode, the battery may run out quicker and may get heated up if left in this state for a long time. Therefore, you have the option to disable it.
Contents
Check If Modern Standby is Supported
Not all devices support Modern Standby, but the number of systems that do is increasing. I have been using a Microsoft Surface Pro 4 laptop, which supports this feature. Here’s how you can check if your device supports Modern standby.
- Open Command prompt on your Windows 10/11 device.
- Type the command
powercfg -ato check if Modern Standby is supported.
powercfg -a command lists the sleep states available on your computer. In the below screenshot, you will find Standby (S0 Low Power Idle) Network Connected state, indicating that Modern Standby is supported and enabled on this device.
If you run the powercfg -a command on your system, and it shows that S0 Low Power Idle is not supported, this could be a limitation of the system’s hardware to support Modern Standby. Unfortunately, there is nothing you can do to enable it. The alternative is to continue using Standby S3 or any other supported power plan.
Modern Standby (S0 Low power idle) can be in Network Connected mode or Network Disconnected mode.
- Standby (S0 Low Power Idle) Network Connected: This means that Modern Standby with network connectivity is active in sleep mode.
- Standby (S0 Low Power Idle) Network Disconnected: This means that Modern Standby operates without network connectivity while in sleep mode, and the system spends most of the time in DRIPS (Deepest Run-time Idle Platform State).
- Sign in to the Windows 10/11 device.
- Click on Start and search for Registry Editor.
- Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power.
- Right-click on the right-hand side pane and click on New > DWORD (32-bit) Value.
- Provide the name of the registry entry as PlatformAoAcOverride and set its value to 0.
- Since this registry change is in HKEY_LOCAL_MACHINE, a restart of the PC will be required.
Disable Modern Standby Using Command Prompt
- Open Command prompt on a Windows 10/11 in admin mode.
- Type the following command and press Enter.
- After this command is executed successfully, restart your device.
Disable Modern Standby
reg add HKLM\System\CurrentControlSet\Control\Power /v PlatformAoAcOverride /t REG_DWORD /d 0
Enable Modern Standby
If your device supports Modern Standby and you have created PlatformAoAcOverride registry entry, simply delete it and restart your device to enable Modern Standby again.
You can delete the PlatformAoAcOverride registry entry manually using the registry editor, or launch the PowerShell console as an administrator and run the following command to delete it.
Remove-ItemProperty 'HKLM:\System\CurrentControlSet\Control\Power' -Name PlatformAoAcOverrideFAQs on Modern Standby
1. Which versions of Windows support Modern Standby?
Windows 10 for desktop editions (Home, Pro, Enterprise, and Education) and Windows 11 Operating system.
2. Does my Computer support Modern Standby?
You can easily check this by running the command powercfg -a on the Command prompt. If it shows Standby (S0 Low Power Idle) Network Connected or Standby (S0 Low Power Idle) Network Disconnected, then Modern Standby is supported.
3. How to Identify and Diagnose Issues during a Modern Standby Session?
You can identify and diagnose any issues related to Modern Standby by running the command Powercfg /sleepstudy in an elevated Command Prompt window. You can then analyze the report, which will be generated and saved at the C:\WINDOWS\system32\sleepstudy-report.html location.
4. How to Find All the Switches of Powercfg Command?
Run powercfg /? In command prompt. This will list all available options with detailed information.
Powercfg /?
C:\WINDOWS\system32>powercfg /?
POWERCFG /COMMAND [ARGUMENTS]
Description:
Enables users to control power settings on a local system.
For detailed command and option information, run "POWERCFG /? <COMMAND>"
Command List:
/LIST, /L Lists all power schemes.
/QUERY, /Q Displays the contents of a power scheme.
/CHANGE, /X Modifies a setting value in the current power scheme.
/CHANGENAME Modifies the name and description of a power scheme.
/DUPLICATESCHEME Duplicates a power scheme.
/DELETE, /D Deletes a power scheme.
/DELETESETTING Deletes a power setting.
/SETACTIVE, /S Makes a power scheme active on the system.
/GETACTIVESCHEME Retrieves the currently active power scheme.
/SETACVALUEINDEX Sets the value associated with a power setting
while the system is powered by AC power.
/SETDCVALUEINDEX Sets the value associated with a power setting
while the system is powered by DC power.
/IMPORT Imports all power settings from a file.
/EXPORT Exports a power scheme to a file.
/ALIASES Displays all aliases and their corresponding GUIDs.
/GETSECURITYDESCRIPTOR
Gets a security descriptor associated with a specified
power setting, power scheme, or action.
/SETSECURITYDESCRIPTOR
Sets a security descriptor associated with a
power setting, power scheme, or action.
/HIBERNATE, /H Enables and disables the hibernate feature.
/AVAILABLESLEEPSTATES, /A
Reports the sleep states available on the system.
/DEVICEQUERY Returns a list of devices that meet specified criteria.
/DEVICEENABLEWAKE Enables a device to wake the system from a sleep state.
/DEVICEDISABLEWAKE Disables a device from waking the system from a sleep
state.
/LASTWAKE Reports information about what woke the system from the
last sleep transition.
/WAKETIMERS Enumerates active wake timers.
/REQUESTS Enumerates application and driver Power Requests.
/REQUESTSOVERRIDE Sets a Power Request override for a particular Process,
Service, or Driver.
/ENERGY Analyzes the system for common energy-efficiency and
battery life problems.
/BATTERYREPORT Generates a report of battery usage.
/SLEEPSTUDY Generates a diagnostic system power transition report.
/SRUMUTIL Dumps Energy Estimation data from System Resource Usage
Monitor (SRUM).
/SYSTEMSLEEPDIAGNOSTICS
The system sleep diagnostics report has been deprecated and
replaced with the system power report. Please use the command
"powercfg /systempowerreport" instead.
/SYSTEMPOWERREPORT Generates a diagnostic system power transition report.
/POWERTHROTTLING Control power throttling for an application.
/PROVISIONINGXML, /PXML Generate an XML file containing power setting overrides.Read Next
rproffitt 2,701 https://5calls.org Moderator
I can’t see anything that allows me to turn sleepstudy off or remove it
rproffitt 2,701 https://5calls.org Moderator
That’s correct. As you read priors you find that another app had locked the folder you want gone. The problem is now «what is that app?» I can’t know since I don’t run your PC.
It appears safe mode and clean boot didn’t work out so go nuclear and boot up any current Linux OS and delete it there. Linux does not worry about Microsoft file permissions.
Thanks. I don’t have Linux though.
rproffitt 2,701 https://5calls.org Moderator
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