Why can I still hear Chrome notification on my laptop even when it's sleeping?

Question

If I put my laptop to sleep, I goes to sleep without problem (screen turns dark, music stops playing, power LED pulses, etc.).

But I can still hear Chrome notification sound constantly. Also when I move the mouse the screen turns on instantly (without any delay at all).

This makes me suspicious that the laptop is not actually sleeping. What's going on?

Answer 1

I figured it out, my laptop has a feature called Connected Standby enabled. I followed these steps to disable it:

• Start the registry editor (regedit.exe).
• Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power.
• Double-click CsEnabled and set to 0, then click OK.
• Restart

After this, the laptop can enter "deep" sleep, so no more notification sound while sleeping and there's a bit of delay when waking up (about 1s).