settings>system>coreelec>limit display colour depth to 8-bit
Thanks, will give it a try and report back.
Well, this is annoying…
Selected 8 bit mode | rebooted | played video and all good.
Deselected 8 bit mode | rebooted | played video and still all good. Nothing I can do will bring back the flicking at the bottom.
I hate these sort of things. 
Does the colour look correct i.e. is it definitely in 10 bit mode. if it comes back you could also look at 4:2:2 Sub sampling.
PS Try turning the TV off and on that may break it again.
No it’s not 10 bit and turning the TV OFF/ON does not help either.
Edit: The TV input is only 1920x1080 at 60Hz when the video is playing.
Sounds like its not getting the displaycaps from the TV. did you power down the tv and the box at the same time off not standby?
PS also try clearing your whitelist so all modes are available.
dispcap looks OK. See dispinfo with video running here.
Rebooted box with CE and kept the TV ON.
Checked whitelist and none are selected.
Unless i am not reading this correctly the box is outputting in UHD at 10bit?
Why do you think its 1080p? are you going through a Amp/Surround Sound ?
------------ /sys/devices/virtual/amhdmitx/amhdmitx0/config ------------
cur_VIC: 93
VIC: 93 3840x2160p24hz
Colour depth: 10-bit
Colourspace: YUV444
Colour range: limited
EOTF: HDR10
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off
The Samsung TV has an info button to display the input signal and that is showing 1080p. I think the info you describe is the streaming signal from the video source.
Is “Adjust Display Refresh rate” in Settings/Videos/Player set to On Start/Stop
Yes it is.
OK I tried it on mine its definitely the outputted Resolution your TV Is not reporting correctly I think.
In the menu
Livingroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 31
VIC: 31 1920x1080p50hz
Colour depth: 10-bit
Colourspace: YUV444
Colour range: limited
EOTF: SDR
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off
Playing HDR Film
Livingroom:~ # cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 93
VIC: 93 3840x2160p24hz
Colour depth: 10-bit
Colourspace: YUV422
Colour range: limited
EOTF: HDR10
YCC colour range: limited
PLL clock: 0xc000027b, Vid clock div 0x000a339c
audio config: on
3D config: off
Livingroom:~ #
But, could that still not be the source as the source is different from when in a menu and playing a video?
I am not sure one of the devs maybe able to confirm. But If I disable the UHD resolutions in the white list and play a UHD film Below is what I get Source Is UHD but cat /sys/devices/virtual/amhdmitx/amhdmitx0/config is 1080p. So to me cat /sys/devices/virtual/amhdmitx/amhdmitx0/config is the current Output Res not Input Res.
cat /sys/devices/virtual/amhdmitx/amhdmitx0/config
cur_VIC: 32
VIC: 32 1920x1080p24hz
Colour depth: 10-bit
Colourspace: YUV444
Colour range: limited
EOTF: HDR10
YCC colour range: limited
PLL clock: 0xc000029a, Vid clock div 0x000b0000
audio config: on
3D config: off
Just one crazy thought your TV does do UHD on all Inputs I know some have a dedicated inputs for UHD
Yes it does. You can select which inputs are for UHD.
Sorry I cant think of anything else to try BUT I think your TV maybe lying to you but as I said the Devs may be able to help more. Its 5:39am here so I will catch up tomorrow and see if they can solve it.
Thanks for all your help.
As discussed above and from dispinfo you resolution is not correct while playing video…
Is your GUI resolution set to 4k?
If yes, than switch it to 1080p by default. and try again
No it is and has always been 1080p.