samos1111
3 Argentium

XPS 15 9550 waking from sleep

My XPS 15 9550 tends to wake from sleep instantly or after a short while. I find this particularly inconvenient if I find it hot in the backpack. It occurs on battery, power adapter, and powered via the WD15 dock. 

For instance, info from Event log \ System:

Information 22/11/2016 22:13:42 Power-Troubleshooter 1 None

The system has returned from a low power state.

Sleep Time: ‎2016‎-‎11‎-‎22T21:13:22.481918500Z
Wake Time: ‎2016‎-‎11‎-‎22T21:13:40.495506200Z

Wake Source: Unknown

I tried to debug the condition using powercfg, but I am not able to locate the cause. 

powercfg -lastwake

Wake History Count - 1
Wake History [0]
Wake Source Count - 0

powercfg -devicequery wake_armed

NONE

(because I have disabled everything which could cause wake)

powercfg -availablesleepstates

The following sleep states are available on this system:
Standby (S3)
Hibernate
Hybrid Sleep
Fast Startup

The following sleep states are not available on this system:
Standby (S1)
The system firmware does not support this standby state.

Standby (S2)
The system firmware does not support this standby state.

Standby (S0 Low Power Idle)
The system firmware does not support this standby state.

Is this normal? I have noticed that toggling 'C states' in BIOS doesn't affect the outcome. 

powercfg /sleepstudy

S0 Low Power Idle is not supported on this machine. Cannot run tool.

Finally, powercfg -energy makes a long report, but I don't know if it is of any use:

Power Efficiency Diagnostics Report

Computer Name OOOPS
Scan Time 2016-11-22T18:04:37Z
Scan Duration 69 seconds
System Manufacturer Dell Inc.
System Product Name XPS 15 9550
BIOS Date 08/31/2016
BIOS Version 1.2.14
OS Build 10240
Platform Role PlatformRoleMobile
Plugged In false
Process Count 131
Thread Count 1815
Report GUID {3eb69dcf-8858-4635-844e-adca279a885b}

Analysis Results

Errors

Power Policy:802.11 Radio Power Policy is Maximum Performance (On Battery)
The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes.
Power PolicySmiley TongueCI Express ASPM is disabled (On Battery)
The current power policy for PCI Express Active State Power Management (ASPM) is configured to Off.
Power PolicySmiley Very Happyisplay timeout disabled (Plugged In)
The display is not configured to turn off after a period of inactivity.
Power PolicySmiley Frustratedleep timeout is disabled (Plugged In)
The computer is not configured to automatically sleep after a period of inactivity.
Power PolicySmiley TongueCI Express ASPM is disabled (Plugged In)
The current power policy for PCI Express Active State Power Management (ASPM) is configured to Off.
CPU UtilizationSmiley Tonguerocessor utilization is high
The average processor utilization during the trace was high. The system will consume less power when the average processor utilization is very low. Review processor utilization for individual processes to determine which applications and services contribute the most to total processor utilization.
Average Utilization (%) 20.68
Platform Power Management CapabilitiesSmiley TongueCI Express Active-State Power Management (ASPM) Disabled
PCI Express Active-State Power Management (ASPM) has been disabled due to a known incompatibility with the hardware in this computer.
Device Drivers:
Devices with missing or misconfigured drivers can increase power consumption.
Device Name Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64
Device ID ROOT\NET\0000
Device Status 0x1802401
Device Problem Code 0x16

Warnings

Platform Timer ResolutionSmiley Tonguelatform Timer Resolution
The default platform timer resolution is 15.6ms (15625000ns) and should be used whenever the system is idle. If the timer resolution is increased, processor power management technologies may not be effective. The timer resolution may be increased due to multimedia playback or graphical animations.
Current Timer Resolution (100ns units) 40000
Maximum Timer Period (100ns units) 156250
Platform Timer ResolutionSmiley Surprisedutstanding Timer Request
A program or service has requested a timer resolution smaller than the platform maximum timer resolution.
Requested Period 40000
Requesting Process ID 7072
Requesting Process Path \Device\HarddiskVolume5\Program Files (x86)\Google\Chrome\Application\chrome.exe

Information

Platform Timer Resolution:Timer Request Stack
The stack of modules responsible for the lowest platform timer setting in this process.
Requested Period 10000
Requesting Process ID 7072
Requesting Process Path \Device\HarddiskVolume5\Program Files (x86)\Google\Chrome\Application\chrome.exe
Calling Module Stack \Device\HarddiskVolume5\Windows\System32\ntdll.dll
\Device\HarddiskVolume5\Windows\System32\kernel32.dll
\Device\HarddiskVolume5\Program Files (x86)\Google\Chrome\Application\54.0.2840.99\chrome_child.dll
\Device\HarddiskVolume5\Program Files (x86)\Google\Chrome\Application\chrome.exe
\Device\HarddiskVolume5\Windows\System32\kernel32.dll
\Device\HarddiskVolume5\Windows\System32\ntdll.dll
Power Policy:Active Power Plan
The current power plan in use
Plan Name OEM Balanced
Plan GUID {381b4222-f694-41f0-9685-ff5bb260df2e}
Power PolicySmiley Tongueower Plan Personality (On Battery)
The personality of the current power plan when the system is on battery power.
Personality Balanced
Power Policy:Video Quality (On Battery)
Enables Windows Media Player to optimize for quality or power savings when playing video.
Quality Mode Balance Video Quality and Power Savings
Power PolicySmiley Tongueower Plan Personality (Plugged In)
The personality of the current power plan when the system is plugged in.
Personality Balanced
Power Policy:802.11 Radio Power Policy is Maximum Performance (Plugged In)
The current power policy for 802.11-compatible wireless network adapters is not configured to use low-power modes.
Power Policy:Video quality (Plugged In)
Enables Windows Media Player to optimize for quality or power savings when playing video.
Quality Mode Optimize for Video Quality
System Availability Requests:Analysis Success
Analysis was successful. No energy efficiency problems were found. No information was returned.
USB Suspend:Analysis Success
Analysis was successful. No energy efficiency problems were found. No information was returned.
Battery:Battery Information
Battery ID 41179Samsung SDIDELL M7R9658
Manufacturer Samsung SDI
Serial Number 41179
Chemistry LiP
Long Term 1
Sealed 0
Design Capacity 55997
Last Full Charge 53158
Platform Power Management CapabilitiesSmiley Frustratedupported Sleep States
Sleep states allow the computer to enter low-power modes after a period of inactivity. The S3 sleep state is the default sleep state for Windows platforms. The S3 sleep state consumes only enough power to preserve memory contents and allow the computer to resume working quickly. Very few platforms support the S1 or S2 Sleep states.
S1 Sleep Supported false
S2 Sleep Supported false
S3 Sleep Supported true
S4 Sleep Supported true
Platform Power Management Capabilities:Connected Standby Support
Connected standby allows the computer to enter a low-power mode in which it is always on and connected. If supported, connected standby is used instead of system sleep states.
Connected Standby Supported false
Platform Power Management Capabilities:Adaptive Display Brightness is supported.
This computer enables Windows to automatically control the brightness of the integrated display.
Platform Power Management CapabilitiesSmiley Tonguerocessor Power Management Capabilities
Effective processor power management enables the computer to automatically balance performance and energy consumption.
Group 0
Index 0
Idle State Count 3
Idle State Type ACPI Idle (C) States
Nominal Frequency (MHz) 2601
Maximum Performance Percentage 100
Lowest Performance Percentage 30
Lowest Throttle Percentage 30
Performance Controls Type ACPI Performance (P) / Throttle (T) States

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samos1111
3 Argentium

RE: XPS 15 9550 waking from sleep

It appears that Fast startup is a no-no.

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