Peter Chamberlain wrote:We can now see this.. If you have a multi-GPU Windows system, you need to set your GPU Processing Mode to Auto before upgrading to DaVinci Resolve 15.1.
This will be addressed in the next dot update.
+1. I have this problem also. I have multiple GPUs. I un-installed 15.1 and went back to 15.0.1, changed the GPU processing mode to Auto, then upgraded to 15.1. First time it loaded, second time it got hung up again on looking for control surfaces. So apparently this is not merely a matter of changing a setting before upgrading, but changing it to "Auto" and leaving it set to "Auto" otherwise Resolve wont load. That's where Im at now. So now I have to un-install resolve, install 15.0.1 again, set the processing mode to auto and then leave it set to auto until this issue is fixed.