While viewing this thread in Edge. Open co-pilot chat in upper right corner of page, Ask this exact question -
How can I manage notification sounds in modern standby on Windows 11?
It's answer analyzes everything in this thread and basically says what you have been told, but puts it all in a clear chronilogical perspective and says what you can and can not do regarding sounds when using Modern standby(s0). Through your interaction with co-pilot's questions to you, it can also analyze each of the wake event s in your event viewer screenshot
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The specific answer from Co-pilot regarding why you are hearing sounds when plugging in AC power is:
Why AC power causes notification sounds
Your event logs show entries like:
- AC/DC Display Burst Suppressed
- Exiting Modern Standby
- Reason: InputMouse
These are normal Modern Standby wake sources. Microsoft confirms that hardware interrupts (power, input, Bluetooth, network stack) can wake the SoC briefly even when the screen stays off .
So the sequence is:
- Laptop is in S0 Low Power Idle
- You plug in AC power
- Power controller triggers a wake event
- Wi‑Fi stack reinitializes
- Mail syncs
- Notification sound plays
- Screen stays off because the system returns to standby
This is expected behavior — confusing, but expected.
Bottom line co-pilot also says that setting lid-close action to hibernate is the only guaranteed method for zero activity and zero sound.
