To be honest, this isn't the first time I've been having these issues. I guess you have already noticed, but I had the same problem in November too and we couldn't find a conclusive answer back then either.
I already have high performance settings enabled on Windows each time I run xlodgen/texgen/dyndolod. The monitor does shut off by its own still due to the settings used, but I noticed the same issue happening even if I didn't let it shut off anyway.
I am looking for it, but haven't noticed such an entry in the Event Log.
However: After doing some research in this thread, I decided to install an older driver version like you also suggested. I went back all the way to 22.5.1 which was mentioned here in the past and surprisingly, everything worked fine and lod generation was successful even without a minimal driver install or shutting off AMD related processes. In fact, I ran DynDOLOD two different times with successful lod generation for each one (let me know if you still want me to post the logs anyway).
Does this mean that newer AMD drivers are a no-go?