May be caused by ALSA. Because I use Gentoo,it can be sound.kernel is
4.4.
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https://bugs.launchpad.net/bugs/1650722
Title:
xiaomi air 12.5 Realtek ALC233 no sound
To manage
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: alsa-driver (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1650722
Title: