(2017-01-29, 19:12)fritsch Wrote: Kodi's advanced scalers are too slow to upscale 1080p to 4k. And GUI scaler is bilinear only.
Did some testing and I realized that yes it's pretty obvious that the Samsung TV does a much better job at upscaling to 4K than Kodi, so setting the GUI to 1080p/60hz is optimum. I guess I didn't do any comparison before since it's so obvious.
Also, for watching sports 60p makes a very noticeable difference, even the GUI is noticeably smoother.
On the other hand, with Kodi 17/estuary, the GUI graphics do look sharper in 4K (perhaps they now use vector graphics instead of 1080 bitmaps?) albeit the animations are not as smooth.
Other trade-offs of 1080p are youtube 4k streaming and picture mode. I guess manually switching the GUI to 4k for the rare occasion when that's needed will do.
Quote:HDMI2 4k@60 output also works. TV needs to be forced into this mode manually (my Samsung for example, see the backlog of this thread). For other models there exist an xorg.conf files to add the modes manually (also see the backlog of this thread).
@
fritsch - are you referring to the DVI output (HDMI-2 in my build, HDMI 1.4 port) or the HDMI output (DP-1, HDMI 2.0 port)?
If the former, I'm not seeing 4K 60p or 60p modes listed by xrandr. In previous posts with xorg.conf modes that refer to 60p and 50p seem to be for the DP-1 port (HDMI2.0)
I do notice that I have an HDMI 1.4 cable between HTPC and receiver (but HDMI 2.0 cable between receiver and TV (4K/60p 4:4:4 capable TV). Bottom line I wonder if 4K 60p would work in the DVI port in 4:2:2 or 4:2:0 mode if I change to a 18Gbps HDMI cable