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kernel modules - How to force HDMI audio (intel card) to ...
https://unix.stackexchange.com/questions/391326/how-to-force-hdmi-audio-intel-card-to-be-enabled-despite-receiving-broken-edid
However, the HDMI audio doesn't work. Pulseaudio is set to the correct sink, which is detected as unplugged (not-available). I tried the following without any resulting change: Add the edid file in initramfs so that EDID is loaded earlier; xrandr --output HDMI-1 --set audio on
RPiconfig - eLinux.org
https://elinux.org/RPiconfig
hdmi_edid_file=1 hdmi_force_edid_audio Pretends all audio formats are supported by display, allowing passthrough of DTS/AC3 even when not reported as supported. hdmi_force_edid_audio=1 hdmi_ignore_edid_audio Pretends all audio formats are unsupported by display. This means ALSA will default to analogue. hdmi_ignore_edid_audio=1 …
RPi Configuration - eLinux.org
https://elinux.org/RPi_Configuration
hdmi_ignore_edid=0xa5000080 hdmi_force_edid_audio Pretends all audio formats are supported by display, allowing passthrough of DTS/AC3 even when not reported as supported. hdmi_force_edid_audio=1 hdmi_ignore_cec Pretends CEC is not supported by TV. Avoids bringing (CEC enabled) TV out of standby and channel switch when rebooting.
audio - sound output stuck on HDMI (working) - Raspberry ...
https://raspberrypi.stackexchange.com/questions/113997/sound-output-stuck-on-hdmi-working
You should try to comment out hdmi_force_edid_audio=1 in config.txt, add/uncomment hdmi_ignore_edid_audio=1 option, then reboot and try amixer again. Also you can check option hdmi_drive : hdmi_drive=1 Normal DVI mode (No sound) hdmi_drive=2 Normal HDMI mode (Sound will be sent if supported and enabled)
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