Any new Windows laptops available/compatible with S3 Sleep Mode?

h0gb0t

Linus Tech Tips seems to indicate that most Windows laptops now have S0 ("Windows Modern Standby", always on) Sleep Mode as the default and can't change to S3, so laptop sleep will likely run the battery to 0% and leave it feeling hot in your backpack (processor and network connections still running in S0 Sleep).

PowerSpec_MikeW

@h0gb0t

This is true and you can check what's available with: powercfg /availablesleepstates

However S3 is the standby mode. It's still powering the system. With Modern Standby or S3, Hibernate(S4) should still be there as the deep sleep option. S4 writes everything to a file called hiberfil.sys and basically powers the system completely off.

Microsoft has a platform requirement for Modern Standby support:

Modern standby systems must implement the Battery Trip Point (_BTP) method in ACPI.

Enables the platform to detect changes in battery percentage while in modern standby. This enables features such as adaptive hibernate to work correctly.

System firmware developer

Source: https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/platform-design-for-modern-standby

This is used to monitor battery drain and push the system into hibernate mode rather than draining the battery when it's unnecessary.

Some additional information on this from Dell: https://www.dell.com/support/kbdoc/en-us/000177661/what-is-modern-standby-and-how-does-it-differ-from-s3-standby#:~:text=Modern%20Standby%20computers%20show%20some,in%20Windows%20Advanced%20Power%20Options.