A debug log would be a great way to start. It sounds like a different issue to the OP however who gets no picture when playing 10-bit files.
Please show:
- Debug log
- Contents of /etc/rc.local
- Whether adjust refresh rate is enabled (you need it on for HDR-10 to work properly)
- MediaInfo (to verify file is 10-bit)
You can downgrade to the June version from Download - OSMC; but then you won’t be getting the latest HDR-10 improvements. This update (July) is the first time 10-bit is working for more users.
Really this should be in a new thread to give OP a chance to get their problem resolved as well.