Open Radar

 
Basic Information
Please provide a descriptive title for your feedback:
Display order should be stable regardless of when they manage to sync on the signal
Which area are you seeing an issue with?
Multiple Displays
What type of issue are you reporting?
Incorrect/Unexpected Behavior
Details
What does the issue you are seeing with multiple displays involve?
Something else not on this list
What is the exact vendor and model of the display you are using?
MacBookPro11,4 internal, Samsung U28E590, BenQ GL2450H
What port on the Mac is the display plugged into?
Something else not on this list
Are you using an adapter in your display connection?
No
When does this issue occur?
Something else not on this list
Description
Please describe the issue and what steps we can take to reproduce it:
I have a MacBook Pro 15" Retina. It has a 1080p BenQ display attached to its HDMI port and a Samsung U28E590 4K display attached to the frontmost left Thunderbolt 2 port via a MiniDP-to-DisplayPort cable. The 4K display is designated as the main display.

The MacBook is permanently set up on my desk, the screens are permanently plugged in. When I turn on all 3 devices (in the same order every morning), it is random which display will be considered "Display 2" or "Display 3" (the 4K display is always Display 1, being the main screen).

Given I have certain applications assigned to particular displays, this means my windows constantly end up moved and resized to fit on the wrong screen.

Can you please fix this?

For my particular use case, it would already help if displays apart from the main screen were sorted by model name or pixel dimensions, or by the name of whatever port they are attached to. 

Thank you.