4k Videos Playing At 1080p

I have an Odroid N2 connected via high speed HDMI to a 4k HDMI port on my Vizio P702ui-B3.

One of the sample files I am using is (UHD Samsung - Dubai File): https://www.demolandia.net/downloads.html?id=60876578

I have adjust refresh rate on start/stop enabled. Is there something I am missing?

This is the output from dispinfo: http://ix.io/2pqJ

Thanks.

Sounds to me like a misconfigured whitelist. Can you clear it?

Can you also give more info about the demo ypu are playing?

So looking at Settings>System>Display, there are various resolutions and refresh rates but the max resolution is 1080p. None of the resolutions are selected - is that what you mean by clearing it, or is there a file I can actually edit to remove the values?

This is the output from mediainfo:

Video
ID                                       : 1
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format profile                           : High@L5.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, ReFrames                : 4 frames
Codec ID                                 : V_MPEG4/ISO/AVC
Duration                                 : 1 min 46 s
Bit rate                                 : 43.0 Mb/s
Width                                    : 3 840 pixels
Height                                   : 2 160 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 0.216
Stream size                              : 544 MiB (97%)
Writing library                          : x264 core 142 r2479 dd79a61
Encoding settings                        : cabac=1 / ref=4 / deblock=1:-1:-1 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=1.00:0.15 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=12 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=24 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=15.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / vbv_maxrate=50000 / vbv_bufsize=60000 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:1.00
Language                                 : English
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

I have also ordered the following HDMI cable:

https://www.monoprice.com/product?p_id=31231

You delete everything in whitelist.

@cdu13a Some of those Vizio TVs were tricky. I think this is a 2014 model, not HDMI 2.0, but it should support 4K @ 60Hz @ 4:2:0.
Can you take a look?

I tried loading the edid from that model vizio tv, and ended up with 4k playback when I tried to play that sample.

Do all 4k files end up playing back at 1080p or just certain ones?

Also you may need to enable the Use 4:2:2 colour subsampling option in
Settings > System > CoreELEC

Otherwise the TVs 300mhz bandwidth limit could cause issues with playback of some files.

Ok, enabling 4:2:2 color sampling causes no signal when I try to play the video.

I only have this one mkv sample and a ts sample. Are there any particular containers or samples i should try?

Well, after two weeks the cable finally arrived and I am now getting 4K playback! Thanks for the help :pray:

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