LG Ultrafine 'black screen' after Mac Mini M2 (2023) goes sleep mode with YouTube playback
After doing some internal investigating, I think I narrowed down the issue to browser playback of YouTube videos after locking the device and letting it sleep after 5 minutes. The following are steps I've taken with the OEM (monitor) and also the OS.
This "issue" didn't start occurring until I upgraded to Sequoia.
OS version - 15.2 (24C101)
Browser - Firefox latest updates.
Device - Mac Mini M2 (2023) 8 GB of memory
External monitor connection
From the HDMI port on the M2 to the back of the monitor.
OS - Energy settings (enabled)
Prevents...display is off
Startup...power failure
OS - Lock Screen settings (updated)
Start Screen Saver ... Never
Turn display off when ... For 5 Minutes
Required password... Immediately
OS - Display settings (enabled)
High Dynamic Range
Refresh Rate - 60 Hertz
Color Profile - LG Ultrafine
External monitor General settings (enabled)
Deep Sleep Mode
Power LED
Repro Steps
- Using a third-party browser, navigate to YouTube and play a video that is greater than the timeout of 5 minutes.
- Lock the device and allow input devices to be idle (e.g. don't touch the keyboard and mouse or engage screen share from another device) for over 6 minutes.
- Return to the desktop after 6 or more minutes and review the blank screen of the external monitor.
Actual Result
The screen appears to be broadcasting the color black, which, when viewed from an angle, clearly looks like the monitor is still on.
Expected Result
The external monitor screen should be black and from an angle does not appear to be on.
Thoughts.
This is probably not the only example, and it might not be exclusive to YouTube videos. But I found this to be the most consistent.
Also, before someone asks, I will also try this with Safar and see if the issue occurs and update my analysis.
Thoughts?
[Re-Titled by Moderator]
Mac mini (M2, 2023)
