Originally Posted by tman247 /t/1517698/playing-movies-on-4k-tv-from-htpc#post_24355760
Agreed, If the TV is receiving a 2160P signal, it shouldn't do any post-scaling. If it's receiving a 1080P signal, it will upscale it internally. I prefer to out the signal to the TV at it's native resolution, as any extra 'processing' can introduce unwanted artefacts.
Agreed. However, since OP is using TV as a native display for his HTPC I would only set HTPC's resolution to the appropriate "native" resolution in this case 2160.
There should be no difference in PQ when playing a 1080p movie. The scaler will do its job regardless of 1080 or 2160 resolution via control panel.
Originally Posted by (Evan) /t/1517698/playing-movies-on-4k-tv-from-htpc#post_24384389
Ok guys, I got the TV yesterday and I am having some huge issues.
1: The TV keeps reading the 1080p input from my computer as 4096×2160. For some reason this creates a lag of about .30 seconds for my mouse and for the audio on videos. Everything is out of sync. The only way to remedy this is to go to the NVIDIA control panel and switch back and forth between various resolutions...until it randomly starts working. When it shows 1080p as the input, the lag is gone. What could cause this? It resets back to 4096×2160 each time I turn off the TV or computer. Not something I can live with if it isn't fixable/
2. When I have the 3D setting turned on in the NVIDIA control panel, I get the same exact lag even though the TV is displaying 1080/24p. I have to set an audio delay in PowerDVD to .30 seconds in order for the audio to be in sync. Not even going to try 3D gaming.
Any idea what could be causing these issues? I'm about ready to send the set back.
1. What you are describing is input lag. There is a lot of processing being done via your Sony 4k TV. To eliminate this processing so that you can play games you are going to need to figure out how to turn them off. Some TV's have an AV mode called "games/sports" which will turn the additional image processing off. I have a pretty good feeling that these early model 4k sets have additional "scaler" processing going on to enhance 1080 signals. Needless to say... to it off. Especially considering you will not need the processing considering you have an HTPC that will play games at the native resolution.
2. The 3d setting via Nvidia control panel does the same thing to me. It induces tons of input lag. I have found that it is extremely difficult to take a high end TV and make it act like a high end computer gaming monitor. It is possible though... play around with the settings on the TV. Personally, if I didn't have the AV mode "games" on my Sharp SQ than I wouldn't be playing games (especially FPS games) cause of the input lag.
A side note: playing games at 2160p will be possible on this particular set due to the update Sony is to release or already has. I do believe though that it will be ycbcr 4.2.0