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When using the cec-utils on a Pi-4 with 2 HDMI devices connected, the one connected to HDMI1 does not respond to commands or show up in a scan.

Running cec-client -l only shows 1 device. Is there something I am missing or is there now way to control both devices using CEC?

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  • What happens when you swap the cables? Can you connect to the same device, or to a different device on the same port? Commented Nov 19, 2019 at 10:24

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You need to enable dtoverlay=vc4-fkms-v3d on your /boot/config.txt also only HDMI 1 works with cec-utils

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