HDR10+ on Odroid N2 and Ugoos AM6B+

Hi, I’ve been using my Odroid N2 since 2019 and always assumed HDR10+ was working because my TV shows the HDR10+ logo. Recently I tested the ff.de “1‑minute HDR10+ system test” clip ( 1 minute HDR10+ system test - FF Pictures GmbH | Florian Friedrich ) and I’m not seeing any sign of dynamic metadata being applied.

To rule things out I connected my N2 to the TV directly and tried every HDR10+ related setting on my TV and different settings in CE. I then tested my Ugoos AM6B+ and the same thing happens, as a test I enabled the HDR10+ to DV setting and the file shows scene changes correctly. The same file also plays correctly on my phone, so the metadata itself seems valid.

For logging, I used:

“while true; do dmesg -c | grep -iE “sei|metadata|hdr10|2094”; sleep 1; done”

After starting the HDR10+ file this is displayed:

“hdmitx: hdmitx_set_hdr10plus_pkt: flag = 1”

Then nothing appears until the file finishes playing and this is displayed:


hdmitx: hdmitx_set_hdr10plus_pkt: zero vsif
hdmitx: hdmitx_set_drm_pkt: disable hdr10+ zero vsif”

I see the same pattern on both devices. Is there a setting I might be overlooking, or is HDR10+ data not being processed?

Thanks.