77 C9 overaggressive full screen ABL in HDR modes!!
Some specific examples: in HDR games that are bright and sunny like Crash Team Racing the sun is much brighter on the C8, but recovers brightness if you view the same sun with dark scenery (a canyon) on the sides, and even in 2.35 aspect ratio DV movies, full screen flaming explosions are much brighter on the C8 (Gladiator, Batman vs Superman, etc.). In all these examples, pressing the menu button on the C9 with its partial dark gradient restores all the brightness to be equivalent to the C8 with NO menus showing. Which is proof the ABL on the 77 C9 is too aggressive vs the 65 C8. I don’t know if it’s due to panel size or C8 vs C9 differences but please make the ABL intensity on C9 the same as on the C8!!!! Right now the C9 is a big downgrade in bright scene performance vs the C8, especially in HDR and DV.
In SDR, there is essentially no difference with the ABL, so clearly related to HDR/DV mode ABL. Just make it the same as the C8, I beg you! Thank you.