ALSA mixer settings show control for speaker output is muted and level set to 0%
!!-------Mixer controls for card PCH
Simple mixer control 'Speaker',0
Front Left: Playback 0 [0%] [-65.25dB] [off]
Front Right: Playback 0 [0%] [-65.25dB] [off]
I suggest you try this command to unmute and increase audio level for speaker output
amixer -D PCH sset 'Speaker' 80% unmute
But it is probably not sufficient to get speakers working
An online hardware scan for same make and model system has a workaround for the speakers
https://linux-hardware.org/?id=pci:8086-51c8-1043-10d3
Chip is ALC294.
Not working with kernel 5.15.19, but I did not try the workaround below. With kernel 5.19.17 (Slackware-current as of Jan 2nd, 2023), I had to install alsa-tools, then use once the commands:hda-verb /dev/snd/hwC0D0 0x20 0x500 0x1b hda-verb /dev/snd/hwC0D0 0x20 0x477 0x4a4b hda-verb /dev/snd/hwC0D0 0x20 0x500 0xf hda-verb /dev/snd/hwC0D0 0x20 0x477 0x74…and audio magically appeared.
This workaround was referred to ALSA kernel developers for further attention, but the bug report was closed ein 2021 because there was no reponse to proposed patch
206289 – No sound on ASUS Zenbook UX533FTC | bugzilla.kernel.org