I have a Venz v12 ultra (V12 ULTRA) which uses the Amlogic S912 soc.
I am unsure which device tree i should be using. In the past i used gxm_q201_3g_1gbit.dtb but this one doenst seem to be present in the device tree folder after creating a fresh installation media.
I have tried both the gxl_p212_2g_slowemmc.dtb and gxl_p212_3g.dtb. This does seem to work initially as i see the core elec logo and some initial install log lines on the screen but after a while it only shows the core elec logo and doenst do anything after that.