About the JL2101 chip on S905X4 devices:
We do not have such “generic” cheap hardware in our inner dev circle, so if someone feel able to test our first public Amlogic-ne (Amlogic - New Era) image we can test the driver implementation.
There are generic SC2 dtbs included, but not tested so it maybe does not boot at all.
Please us only a spare boot media and do not try to upgrade from Amlogic-ng!!
The procedure for Amlogic-ne is same as for Amlogic-ng, so just burn the image to µSD or USB, place dtb.img and hope it’s booting. If booting please check if this ethernet chip is now supported and working with gigabit. If yes or also if not please run dmesg | paste and post the result debug log URL.
CoreELEC-Amlogic-ne.arm-20.0-Nexus_devel_20220922101324-Generic.img.gz