Devices > Video Cards, Monitors, Televisions, and Projectors
MadVR banding
MediaMongrel:
Native resolution of my laptop screen is 1080p 60Hz.. IPS.
I know for a fact my laptop can output 2160p through DisplayPort 1.4.
So I set my external monitor font scaling to 125%, and that seemed to be the magic # for non-scaling MadVR. See attached stats from my recent screen grab.
Unfortunately... with these current settings (tonemap HDR with pixel shaders, I presume is the culprit), I'm now seeing juddering in my video. Even if I set turn on 'enable smooth motion frame rate conversion (only if there would be motion judder without it)', the judder persists. In the 'trade quality for performance' section, the 1st 10 boxes are all checked (aka, most of 'em). Hmmm...
MediaMongrel:
I just checked... my main display (laptop monitor) font scaling was set to 125% all along (recommended setting, it says).
It the 200% font scaling Display Setting was specific to the external monitor, all along... so MadVR was scaling to based on the external monitor font scaling, not the main laptop monitor font scale setting.
And i checked, changing one font scale setting does not affect the scale setting for both monitors in tandem.
tij:
Your rendering time exceed VSync ... so GPU not able to draw frame before it is required ... and some frame gets droppef ... hence stuttering
I suspect your previous setting that downscale to 2400p required less processing as resolution was lower
So it seems your GPU is unable to handle tone mapping for full 4K (minimum for 4K is Nvidia 1060 with 6GB RAM)
So you have two option
1. Play at 4K and passthrough HDR to TV to do tone mapping
2. Use previous setting that downscales video to 2400 and use MadVR tone mapping (in this scenario MadVR downscales to 2400 ... does tone mapping ... and likely Windows DPI scales it back to 4K)
Both situations are not ideal ... but it is what it is
tij:
But its strange tgat when outputting 4800 (dpi 100%) ... madvr able to handle it ...
Let me think on it ... will post later once figure it out
MediaMongrel:
Also, VLC and PowerDVD 20 renderers are able to do 4k HDR without issue, with this laptop.
Again, thanks for your help!
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