Coming back from sleep with an external display dims the Mac's display
Number:rdar://37072741 Date Originated:31-Jan-2018 12:11 PM
Status:Open Resolved:
Product:Mac Product Version:2016 MBP 15 Inch
Classification:UI/Usability Reproducible:Always
The display is dimmed to very low when returning from sleep with an external display plugged in.

Steps to Reproduce:
Plug in external display. Deselect automatically update brightness. Allow the mac to sleep its display. I also have "Put hard disks to sleep when possible" checked. Wake the mac.

Expected Results:
It to return to the previous brightness setting.

Actual Results:
Returns to a very dim brightness setting.

2016 MBP 15 Inch

I notice when I allow the display to auto set its brightness this problem doesn't occur.


Please note: Reports posted here will not necessarily be seen by Apple. All problems should be submitted at before they are posted here. Please only post information for Radars that you have filed yourself, and please do not include Apple confidential information in your posts. Thank you!