Originally Posted by janos666
Not necesserely. It's a debug menu for debugging. You don't really need to check every available picture modes to tell if the hardware isn't defective but the visible brightness fluctuation is just the good old built-in feature as usual.
They didn't design this menu for us to fine-tune the picture quality and eliminate their forced features. If they want to disable this feature then they can do it with a firmware update with or without adding a new manual swith in the normal and/or service menu.
You can already change the active picture mode inside Picture_2D, so I don't see the idea behind separete these two.
But I still hope there is a solution and of course, every ideas are welcomed.
Did some more testing and need to reverse my original finding about standard mode. I started more thorough testing by monitoring the 40% stimulus bar in the dynamic contrast pattern. What I originally thought about standard vs. movie mode is not correct, they behave the same in that subsetting  disables user control of dynamic settings low, medium, high but does not
eliminate inherent DC.
Some other findings:
1. Changes in subsettings and enhance menu survive a factory reset.
2. Zeroing out the first six items in the enhance menu has the same effect as turning contrast dimming off, i.e. user menu settings have no effect.
3. Have not found any effects toggling either peak dimming or dynamic CE using test patterns.
4. Occasionally when entering non-existent menu numbers the tv will crash and can only be turn off by removing power.
So at this point it appears there is an inherent dynamic contrast that the user can adjust the magnitude of but that can't be disabled via software. I suspect this is built into the way the panel is driven and that a firmware fix will not eliminate it, the best you can do is improve the firmware to reduce noticeability, which is exactly the same position panasonic owners are in. If I were offered such a firmware fix I would refuse it as my display shows none of the artifacts discussed in this thread.