Hp Spectre won't sleep consistantly when connected to Thunderbolt 3 dock

[mogulman]

My new HP Spectre won't sleep consistently when connected to my Thunderbolt 3 dock.  It works fine when not connected to the dock.  Sometimes the notebook won't try and sleep at all.  Sometimes it looks like it is sleeping and then wakes up after a few seconds.  My old Spectre (2017) works fine when connected the same way.

Details of my system:

 I used to have an HP Spectre x360 - 13-w023dx.   Now I have a HP Spectre x360 - 13-ap0033dx.

I have an HP Elite Zbook Thunderbolt 3 dock 65w that I am using.  I used it with the old one and with the new one.    The Dock is updated to the latest firmware.   Both laptops are updated to the lastest HP bios/drivers and windows update.  Windows 10 64-bit 1903.  Although I tried with Windows 10 64-bit 1803, before I updated.

Things connected to the Dock:  Ethernet cable, External Sandisk USB 3.0 SSD, USB keyboard/mouse, Displayport monitor

Things I've tried:

• Disconnecting everything from the Dock except power and the Thunderbolt cable.    This didn't seem to help.  Although disconnecting the ethernet cable seems to allow the laptop to sleep more consistantly, sometimes it still won't sleep.
• Make sure all devices that can wake windows 10 are disabled.  Keyboard/mouse, thunderbolt.  Validated using powercfg -devicequery wake_armed and nothing is showing up.
• Validated that there are no current wake timers, waking the device.
• Tried sleeping using Windows OS Sleep icon in start menu, button on Thunderbolt dock, button on laptop, closing laptop lid.  None work.
• Tried disabling away mode to see if that helped.  No luck.
• Tried disabling Fast Startup.  didn't help.

Any ideas?   I think at this point I either have to shutdown or disconnect the thunderbolt cable before sleeping.

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[mogulman · Accepted solution]

Did some more research.  It looks like the newer Spectre supports Modern Standby (S0) and not S3 Standby.  So the system goes into a sleep mode where it is more awake than S3.  I thought it wasn't sleeping at all.

This is designed to be that way.  (I don't like it, but that's the way it is).

I confirmed this by looking in the sleepstudy for the pc and doing some research. 

It seems like this is the way of the future.