No video with GTX 1070

I'm running High Sierra on 378.10.10.10.20.107 of the web driver. When I get past the Apple logo on startup, the screen goes blank. I can log in with Screen Sharing to see that the 1070 is detected, the drivers are operational, and video acceleration works correctly, but there is no output through HDMI. My GTX 980 works fine. What can I do to fix this?

submitted by /u/unscot
[link] [comments]