JTL
So I can't say anything definitively yet, but I do have significant evidence that what I am seeing is in the video signal and not due to the panel. I was watching this utube video https://duckduckgo.com/?q=dreamweaver&t=hf&iar=videos&iax=videos&ia=videos&iai=ORV1HOSgv2Q and noticed that the "dithering" I see on the Dasung panel was also in the video. to describe it, imagine textures to be represented by a temporally static combination of wavy filaments and dots about 1-3 pixels in width that move with relative intensity to their proximity to the mouse cursor. Well, I noticed the "Dithering" --(maybe not the correct term here) in the white parts of the video following the mouse in the video not my mouse. I plugged in an old LCD and moved the video to that monitor, and could not see any dithering. Moved it back to the Dasung and the dithering was there. So there is strong evidence that there is some source of dithering on Max,Linux, and windows 8-10 that is present in the video signal regardless of hardware. My previous known good configuration was ATI graphics connected to 4k flicker-free 8bit benq with each head running through an HD PVR Rocket set to 23 and 25 hz refresh. on windows 8.1 deleting the monitor-device in device manager then setting the generic monitor device to disabled. then keeping some portion of webkit enabled active windows on each monitor so they would get conflicting clock edges. I cant say if my condition has progressed or if some update has rendered this no longer usable, but it seems like the no-light Dasungs are my only option now. I can say that the "dithring" I see on those is not eliminated by the DP_DisableDither reg entry with ati or by Ditherig.exe on Intel. It is present in differing levels on Linux and windows, but there in both. it comes in 2 varieties, always moving, and only moving with the mouse. The PVR rocket seems to act as a partial low-pass filter and reduces but does not eliminate the degree of "dithering". This is also true of virtual machines. At this point my observations have been casual, I will do a rigorous and scientific analysis when I have a better Idea of what I am looking for. I am not even sure if the “Dithering” I see is what makes me sick. After 10 years, the symptoms have gotten more severe and the brunt happens the next day so I am a little gun shy of using myself as a lab rat.
I know I owe a video, but I am such a PITA anti-smartphone guy that I have to eat crow in order to ask a friend to use theirs.