My Samsung Odyssey WMR headset will not wake up. I'm on a Dell Precision 7720 on Windows 10 with Quadro P5000 and it has worked great up until tonight It is set up in special graphics mode routing the P5000 to my external ports. It connects and the Windows MR portal thinks all is well, but the Odyssey screen is black and the green light blinks, indicating sleep. The wireframe setup screen and the Cliff House shows on my laptop screen where it should be on my headset.
I had the same issue after the 1.3.2 bios update for my Inspiron 15 Gaming 7577. I've sent in all sorts of Feedback reports and keep hoping driver updates will correct it. The HoloLens development forum is where MS sent me after Dell just shrugged.
Is there a special setting in the MR Portal or Mixed Reality Settings section that I'm missing? I have developer mode on my PC turned on(under Settings->Updates and Security->For developers) for Visual Studio. I switched to Sideload mode(which got rid of the developer menu from the MR Portal) but it didn't change the "no display in the headset, just blinking green light". Note, it worked in developer mode before the 1.3.2 bios update for my machine.