Originally Posted by NismoZ
For all those who are struggling with gradient color banding from external sources, I started an LG forums post on it. Anything you can add example wise or experiences would benefit up here.
the gradient issue continues to drive me nuts. I have the 77c9 hooked up to HTPC as well as a monitor (a high framerate low contrast VA panel) and I can literally drag the same content from one side to the other and make the gradient posterization go away. in addition to the testing on other monitors, it's pretty clear that some messed up processing has been going on - when you pause it on a gradient scene, the little bands oscillate as the processing fights with itself stupidly.
I added the PC to the LG device using the device connector thing and pretended it was a bluray player, but that doesnt work.
honestly it doesnt matter for 95% of content, especially content that has been photographed with real cameras. film grain seems to mitigate it for the most part. but gradients that are very smooth or computer generated (the logo at the beginning of Timescapes, the sun's halo over the earth in blue planet II logo scene) can look like low color 90's video game banding. I can get thru nearly all of blade runner 2049 without noticing it until the scene at the end where the clouds come up (attached, interested in anyone's ability to get a clean shot of this at 02:27:47 and what setup they have).
Other notes from continued setup tweaking went through a bunch of cables: (I only tested one per brand)
Belkin 48g 6ft (some stability issues but tolerable, sometimes requires a reboot to fix)
Monoprice 48g 6ft (least stable at high throughput, surprising and unfortunate because super cheap)
Club3D CAC-1371 3ft (most stable, only 1 or two weird connection artifacts, but nothing during content)
I've been pixel peeping for gradients so hard that now when I look at real life sunsets they dont look smooth enough.
setup is 980ti from only hdmi out to TV's topmost hdmi port 8bpc or 12bpc/23hz/RGB, ISFDark, Cinema Home, Technicolor Pro, MPC-BE+MadVR.