ios – Mac received’t sleep or shut down as a consequence of persistent PreventUserIdleSystemSleep assertion — can’t discover the trigger

’m having a problem on macOS the place my MacBook Air refuses to sleep or shut down correctly. Once I run:

pmset -g assertions

I constantly get a system-wide assertion:

PreventUserIdleSystemSleep = 1
pid 119(powerd): "Powerd - Forestall sleep whereas show is on"

No third-party audio drivers seem like put in anymore. I already eliminated BlackHole, killed coreaudiod, and checked:

/Library/Audio/Plug-Ins/HAL
~/Library/LaunchAgents
/Library/LaunchAgents
/Library/LaunchDaemons

Solely these two HAL drivers stay:

ParrotAudioPlugin.driver
ZoomAudioDevice.driver

However even after restarting coreaudiod and checking for leftover launch brokers, the assertion stays energetic. The system retains reporting UserIsActive and PreventUserIdleSystemSleep, even once I’m not touching the pc.

Different particulars:

macOS: 26.1

I eliminated WhatsApp Desktop and verified there’s no leftover container recordsdata.

I’m not operating any audio routing instruments anymore.

Nothing apparent seems in Exercise Monitor.

What may nonetheless be holding PreventUserIdleSystemSleep alive?
And the way can I hint precisely which course of or subsystem is stopping sleep when powerd itself is the proprietor?

Any assist can be appreciated.