Frame rate mismatch maybe causing green overlay on monitor?

Hey All –

I’ve been given someone else’s Resolve project (always hard to cook in someone else’s kitchen), and I’m running into a problem that PROBABLY has a simple fix.

In Project Settings - Video Monitoring set to 1080p 23.976 (which matches timeline settings), I get a green cast-overlay on my monitor. Photo enclosed for reference.

When I tab out of Resolve (put Resolve in the background), the image clears up and looks correct – until I bring Resolve back to the front.

I recognize that as likely a sync playback issue, so I experiment a bit and discover that if I set Video Monitoring to 1080 60i, the image is fine, but the timeline plays back at 60fps (as if I sped up the timeline).

Any suggestions would be MUCH appreciated! Thanks in advance!

Resolve 17.2.1
iMac Pro
MacOS 11.3.1
3 GHz 10-Core Intel Xeon W
64 GB 2666 MHz DDR4
Radeon Pro Vega 64 16 GB

Signal chain
iMac Pro - UltraStudio 4k via Thunderbolt - SmartScope Duo via SDI - Sony Monitor via SDI

mismatch output.png (722.24 KiB) Viewed 494 times