Almost. You have to rename KERNEL to kernel.img.
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Please try 2nd test build:
2016-08-22-4K-test3
It will either be better or GUI won't show at all at 4K.
I have installed the new test version. Beelink Minimxiii booted fine, displaying GUI as a 1/4 size in the upper left corner. TV Info shows resolution as being 2160p60Hz.
Adjusting settings to proper resolution renders a black screen.
I have rebooted using Yatse remote (no screen display to navigate menu) and same 1/4 screen issue (see picture).
If I set resolution to 1080p, it works, going back to [email protected] renders black screen again.
See Logs attached. Newer is after reboot.