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--- doc:appunti:hardware:mini_pc_ryzen_7_5825u [2025/10/17 16:08] – [The problem of mute HDMI audio] niccolo
+++ doc:appunti:hardware:mini_pc_ryzen_7_5825u [2025/10/17 16:36] (current) – [The problem of mute HDMI audio] niccolo
@@ Line 97: / Line 97: @@
 </code>
-**NOTICE**: The ''alsactl restore'' command is executed passing the ID of the sound card (**Generic_1**). This is required because restoring the ALSA mixer status for all the cards leads to this error message:
+**NOTICE**: The ''alsactl restore'' command is executed passing the ID of the sound card //Generic_1// (passing the card number is not feasible because that number can vary across reboots). Passing the card ID is required because restoring the ALSA mixer status for all the available cards leads to this error message:
 <code>
@@ Line 103: / Line 103: @@
 alsa-lib parser.c:2080:(parse_verb_file) error: no use case device defined
 alsa-lib main.c:1541:(snd_use_case_mgr_open) error: failed to import hw:1 use case configuration -22
+</code>
+To view the **card ID** associated to the **card number**, inspect the ''/proc/asound/cards'' pseudo file:
+<code>
+cat /proc/asound/cards
+[Generic_1      ]: HDA-Intel - HD-Audio Generic
+                      HD-Audio Generic at 0xfc9c8000 irq 69
+[Generic        ]: HDA-Intel - HD-Audio Generic
+                      HD-Audio Generic at 0xfc9c0000 irq 70
+[Device         ]: USB-Audio - USB Audio Device
+                      C-Media Electronics Inc. USB Audio Device at usb-0000:04:00.4-3, full speed
+[acp            ]: acp - acp
+                      HCTechnology.Ltd.-HCAR5000_MI-Defaultstring
 </code>