mss
Hello there,
Thank you for taking the time to test the suspend function across both Linux and Windows 11 systems and sharing your detailed observations with us.
We greatly appreciate your thoroughness in helping us pinpoint the root of this behavior, and we want to clarify the underlying mechanism to address your concerns about energy saving and standby functionality.
First, we want to confirm that the behavior you’ve described—screen turning off while the fan continues to run and the power LED remains steady (rather than pulsating)—is not a BIOS/ACPI bug, but instead tied to the Modern Standby (also known as S0 Low Power Idle) feature enabled on your SER9 device, which is a standard design for modern Windows 11-compatible hardware.
Why This Happens with Modern Standby
Modern Standby replaces the traditional S3 “deep sleep” mode to deliver instant wake responsiveness (similar to smartphones/tablets). It operates in two modes:
Connected Standby: Maintains a low-power network connection for background updates, email sync, and app notifications.
Disconnected Standby: Disables network access but keeps core components active for fast wake.
In both modes, key hardware (CPU low-power cores, memory, and system controllers) remains active to preserve instant-on capability. If background processes (e.g., system updates, app sync) or residual hardware load generate mild heat, the fan will run at low speed to prevent overheating, and the power LED stays solid (unlike the pulsating indicator of legacy S3 sleep).
This aligns with your experience across both Windows 11 and Linux (many modern Linux distributions also support and prioritize Modern Standby for compatibility).
Have a nice day~
