Debugging blank display after initial rainbow splash. RPi4 + Toyota Sienna display

    Log dump: https://paste.libreelec.tv/workable-raccoon.log

    I had this working a year+ ago, updated things, and now I'm just getting the rainbow/color wheel initial boot image and then a black screen. Digging through the logs it appears to be detecting a 1280x720 display, which is what the van has.

    What should I be doing for further debugging? I had an edid config that I removed, it didn't change anything either way with or without it.

    The same setup works when connected to a PC Monitor via HDMI.

    Code
    2025-06-26 08:44:18.950 T:1123    debug <general>: CDRMUtils::OpenDrm - opened render node: /dev/dri/renderD128
2025-06-26 08:44:18.950 T:1123    debug <general>: COffScreenModeSetting::InitDrm - initialized offscreen DRM
2025-06-26 08:44:19.064 T:1123    debug <general>: CWinSystemGbm::InitWindowSystem - initialized DRM
2025-06-26 08:44:19.064 T:1123     info <general>: Found resolution 1280x720 with 1280x720 @ 50.000000 Hz

    The "initialized offscreen DRM" message means the kernel did not detect a DRM display device and Kodi started in offscreen mode and the fake resolution for offscreen mode just happens to be 720p.

    If the board is connected to the van's screen via HDMI, I would be investigating cables and adapters first.