I am running Windows 8.1 under Boot Camp on a MacBook Pro Retina 15" at its native resolution of 2880×1800, with an Oculus Rift DK2 connected as an extended display at its native resolution of 1920×1080, and the Oculus Runtime 0.6.0.0 installed and running.
The Windows Display panel has "Let me choose one scaling level for all my displays" checked, and the scaling set to 250%.
While testing some software I made the Rift the primary display, and now I want to go back to the MacBook as the main display and the Rift as the secondary display. But when I try to apply this change, I get this error: "The display settings could not be saved. Please try a different combination of display settings."
I've switched primary displays back and forth before without any problem, but for some reason it stopped working and I am stuck with the Rift as the primary display.
I tried switching the Rift to Direct Mode and back, and uninstalling and reinstalling the Oculus Runtime. I searched for the error message and found a number of discussions about triple monitors – not the problem here – and also one suggestion to delete a nonexistent registry key.
How can I get past this error message and force it to make the MBP the primary monitor again with the DK2 a secondary extended display?
Best Answer
The trick, as suggested in a comment on this page, turned out to be to lower the resolution of both the MBP and the DK2. I set the MBP to 1920x1200 and the DK2 to 1600x900 and applied that change. Then I was able to set the MBP as the primary monitor and apply that successfully. After that I set both devices back to their native resolution again.
Interestingly enough, now the machine is back in the state it used to be in where I can freely switch the primary display back and forth between the MBP and DK2.