January 7, 20233 yr Hello, I have had a nanopc-t4 and a few others for a long time now. I have tried to create a working dtb for it a few different times. My understanding of device trees is superficial I have not had good success. I have read the kernels DT docs many times. I can of course run an ancient 4.19 kernel but I would much rather be at the edge. Currently I've got armbian 22, but no edp. I can boot Friendly's lubuntu and then the edp works. Although it is edp or hdmi not both. I must unplug the edp to get the hdmi port to work. Which is really undesirable. If I remember, it can only enable 2 of its 3 hdmi ports at a time, so that is likely a simple DT change. I am wondering if it is even reasonable to wish for a working edp port with a modern kernel on any arm board. Or if possibly someone has a device tree for it that enables the edp. I have not tried an LTS version of armbian, I'm not familiar with the names and versions. I will look. So I'm wondering if anyone has the edp working or can explain where to look and maybe even why this situation exists where device support is lacking in newer kernels. Any help would be appreciated, Erica
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