I've seen this HDMI issue on some SM1 units, "TV Boxes". There is a REVERT floating around which resolves it, but was not accepted. https://lore.kernel.org/linux-arm-kernel/001401db8ed4$392ef030$ab8cd090$@martijnvandeventer.nl/T/ I've been currently using it on 6.12.y. I have no clue if the current STABLE kernel also has this problem. REVERT-clk-meson-g12a-Fix-kernel-warnings-when-no-display-attached.patch

Some chips used in those usb2sata adaptors have issues combined with issues that are present on USB3 stack on some SoCs = troubles. Generally, USB3 storage solutions are to be avoided if possible.

Board usually shuts down in case it reached critical temperatures. Can you add a heatsink?

- there are several revisions of Rock64 and not all work so the problem is similar to cheap TV boxes, which are assembled from random hardware parts - released images (at least Debian minimal) work on my revision, however I didn't test HDMI output Try attaching serial console to see where it stops, check if it gets up on the network ... perhaps its "just" broken HDMI.

My switch correctly negotiates a 100mbps speed, and I also tried forcing it to 100mbps. In both cases, it links (LED on the switch is on and info from the switch says it is correctly negotiates 100mbps), and I see the TV box send a request for DHCP, and I see the answer from my DHCP server, but it stops there, I get no IP assigned in my interface. Setting a static IP on the interface also fails. I think I will start a new thread about this issue to better track this bug.