树莓派4b
ubuntu 21.04
解决办法：
>>> sudo vim /boot/config-5.11.0-1015-raspi ...dtparam=audio=on # 重启>>> sudo reboot now >>> aplay -l **** List of PLAYBACK Hardware Devices ****card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones] Subdevices: 8/8 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 Subdevice #4: subdevice #4 Subdevice #5: subdevice #5 Subdevice #6: subdevice #6 Subdevice #7: subdevice #7card 1: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM vc4-hdmi-hifi-0 [MAI PCM vc4-hdmi-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0card 2: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM vc4-hdmi-hifi-0 [MAI PCM vc4-hdmi-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0参考：https://discourse.osmc.tv/t/alsa-doesnt-work-after-last-update/10600/3