So, I was running the TVbox headless and I didn't notice but got i think the same issues with HDMI output. Multitools works if I disable FreeSync/120Hz and put HDMI input in compatibility mode (1.4), Armbian_23.08.0-trunk_Rk3318-box_bookworm_edge_6.3.13 and Armbian_23.8.1_Rk3318-box_jammy_current_6.1.50 kinda work but there are problem of SYNC and overscan. Armbian_23.8.1_Rk3318-box_bookworm_current_6.1.50 does not work at all. Without HDMI compatibilty mode enabled the monitor shows an OUT of Range error with a 5Hz signal. LG32GN650.
With an old Samsung 32'' 1080 panel and a new 70'' 2160 one, no luck at all at displaying any image, even using an HDMI switch.
My board.
