I got my Vero 4K+ yesterday and installed it. For almost one hour, everything worked great. After this tine it started to show strong artefacts on X265 4K content. I switched to another movie - the same. Today, it is not possible to play any 4K content without these artifacts.
I guess it helps if you upload a picture showing what you see.
Also provide mediainfo from the file and a log file so we can see the capabilities your TV annouces.
You can also create the mediainfo-output of the affected media file on the OSMC device:
login via SSH, user osmc, password osmc
if not already installed: sudo apt-get update && sudo apt-get install mediainfo
cdto the directory containing the video/audio material in question
since mediainfoonly needs to read the header information of the file data, copy the first 4 Mbytes of the media file to a new file: dd if="<media file>" of=purgeme.bin bs=1024 count=4096
upload the decoded media information using mediainfo -f purgeme.bin|paste-log
publish the returned URL here in this topic
remove the created media file snippet rm purgeme.bin
Another additional test result. With an original remux of the blu ray without reencoding, it is the same problem. It seems now to happen with any 4k content.
Unfortunately, the new kernel did not solve my issue. I have installed kodi on my tv and my apple tv for testing. I noticed now, that also the wallpapers of the kodi gui on osmc have also artefacts (gui is running with 1920 x 1080 @60) . My “native” kodi installation on my tv looks good and also the kodi installation has perfect colors.
The Vero 4K+ is connected by a Denon AVR-X4400H to my Philips 55POS9002.
Add the following line: deb http://apt.osmc.tv stretch-devel main
Run the following commands to update: sudo apt-get update && sudo apt-get dist-upgrade && reboot
Your system should have have received the update.
Please see if the issue is resolved.
I also recommend you edit /etc/apt/sources.list again and remove the line that you added after updating. This will return you to the normal update channel.