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Pulse-Eight / libcec

USB CEC Adapter communication Library http://libcec.pulse-eight.com/
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echo "scan" CEC failed on raspberry 4 #653

Open Louishattiger opened 5 months ago

Louishattiger commented 5 months ago

Background: Sending commands to my computer or smart tv via an hdmi cable from a raspberry 4 (volume up/down, play/pause, mute/demute,...)

I first have this problem:

sudo echo 'scan' | cec-client -s -d 1 opening a connection to the CEC adapter... ERROR: [ 675] CLinuxCECAdapterCommunication::Write - ioctl CEC_TRANSMIT failed - tx_status=00 errno=64

CEC bus information device 1: Recorder 1 address: 1.0.0.0 active source: no vendor: Pulse Eight osd string: CECTester CEC version: 1.4 power status: on language: eng

Then i followed the issue #597 and I changed dtoverlay=vc4-kms-v3d to dtoverlay=vc4-fkms-v3d in config.txt (and reboot the rasp). Now it seems that I take a step backwards:

echo "scan" | cec-client -s -d 1 autodetect FAILED

sudo cec-client -i libCEC version: 6.0.2, compiled on Linux ... , features: P8_USB, DRM, P8_detect, randr, Exynos, Linux, AOCEC

uname -a Linux raspberrypi 6.1.0-rpi7-rpi-v8 1 SMP PREEMPT Debian 1:6.1.63-1+rpt1 (2023-11-24) aarch64 GNU/Linux

Could this be because the raspberry 4 has micro hdmi and not hdmi? I'm a bit lost :(

Thank you in advance for your help

wallagib commented 4 months ago

I'm seeing this issue too. Right now, I'm struggling to build from source because, even though I'm following the RPi guide, it requires RPI_BCM_HOST to be set, and this apparently doesn't exist in newer Raspbians.

wallagib commented 4 months ago

This comment also has some tips for building, but I didn't have much luck the first time around: https://github.com/Pulse-Eight/libcec/issues/470#issuecomment-629702541