I do not see the 4K settings… ? its me or something wrong ? I have last CoreELEC build with S912 TX8 4/32 box
Do you mean that you don’t see 3,840 x 2,160 listed in
Settings > System > Display > Resolution ?
can you ssh into the and run the following command and post the resulting URL so that I can take a look at what is happening.
Also is there an AVR or other device between your TV box and the display?
sorry my mistake its not a 4k tv … 8-((