I have a NUC7I5BNH miniPC (Win 10, 64 bit, Fall Creators update, latest Windows updates, latest BIOS, latest drivers, latest HDMI firmware as of 24 Jan 2018) that was until recently connected to a Sony KDL-52Z5800 TV (1080p TV).
Last week, I exchanged my TV with a Sony KD-65A1 4K OLED HDR TV.
I connected the NUC with the HDMI 2 input of the Sony KD-65A1, using an Ultra HD 2160p 60Hz 18 Gbit/s HDMI 2.0b specified cable (tried 2 different ones!).
On the Sony TV, I enabled 'HDMI Enhanced mode' which allows to view 4K or HDR pictures at 18 Gbps according to http://sony-eur-eu-en-web--eur.custhelp.com/app/answers/detail/a_id/136957/~/how-to-set-up-your-sony-4k-tv-for-a-uhd-%2F-4k-%2F-hdcp-2.2-compliant-hdmi
The NUC is set to 3840 x 2160 at 60Hz in the Intel Graphics Control Panel. Colour input range is set to 'Use driver setting' > 'Full range'.
I have 2 problems:
- Colour banding: indeed, when checking in Windows in 'HDR and advanced colour settings', the colour depth is 8-bit and the colour format is YCbCr420. I don't get the NUC to output 10-bit, whereas both the NUC and the Sony TV should be compatible with this colour depth.
- HDR: in Windows in 'Display' the 'HDR and advanced color' toggle is visible but after I try to turn it on and confirm the new settings, the toggle is again on 'Off'. In the 'Video playback' settings page, the toggle 'Stream HDR Video' is greyed out.
Any help in sorting out those 2 issues would be greatly appreciated. According to my understanding, but the NUC7I5BNH and the KD-65A1 should be able to handle 10-bit / HDR.
Please find the necessary support files attached.