LE 12 resolution, HDR, and CEC problems after power failure

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    I have a raspberry pi 4B with LE 12.0.1. It was working fine until last night when the power was cut off due to a local grid failure.

    When the power came back LE defaulted to a resolution of 1024x768 (max available), CEC stopped working, HDR and audio were no longer passed through.

    I figured I'd just do a backup, hard reset, and restore backup. The problem persisted after the hard reset.

    I do a clean install of LE 12. Problem persisted.

    Clean install LE 11. No output on either HDMI port. Samba is working, so I place upgrade file on the share. LE reboots and updates to 12. Problem persisted.

    I try raspbian. Fiddled a bit with raspi-config. Problem persisted.

    So I do LE 12 clean install again. I found a few guides here and on other forums. Tried getedid create, avoid_safe_mode=1, and a couple other things I can't remember right now. Nothing worked.

    I'm stumped on how to troubleshoot this further. I don't have another pi to test the board. I'm going to get a new HDMI cable later to try out.

    Edited 2 times, last by den5o (October 29, 2024 at 11:27 AM).