On Pi 5 server:
$ cat /proc/asound/cards --- no soundcards ---
On Pi 5 server with 'dtoverlay=vc4-kms-v3d':
$ cat /proc/asound/cards 0 [vc4hdmi0 ]: vc4-hdmi - vc4-hdmi-0 vc4-hdmi-0 1 [vc4hdmi1 ]: vc4-hdmi - vc4-hdmi-1 vc4-hdmi-1
On Pi 5 server:
$ cat /proc/asound/cards
--- no soundcards ---
On Pi 5 server with 'dtoverlay= vc4-kms- v3d':
$ cat /proc/asound/cards
vc4-hdmi- 0
vc4-hdmi- 1
0 [vc4hdmi0 ]: vc4-hdmi - vc4-hdmi-0
1 [vc4hdmi1 ]: vc4-hdmi - vc4-hdmi-1