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--- doc:appunti:hardware:mini_pc_ryzen_7_5825u [2025/06/07 08:24] – [Problem with audio over HDMI using Pulseaudio and ALSA] niccolo
+++ doc:appunti:hardware:mini_pc_ryzen_7_5825u [2025/06/07 08:54] (current) – [Problem with audio over HDMI using Pulseaudio and ALSA] niccolo
@@ Line 7: / Line 7: @@
 ===== Linux kernel support of WiFi adapter =====
-GNU/Linux **kernel 6.1.0** shipped with **Debian 12 Bookworm** does not support the WiFi adapter FIXME.
+GNU/Linux **kernel 6.1.0** shipped with **Debian 12 Bookworm** does not support the **RTL8852BE** WiFi adapter. You can download kernel 6.12.22 from bookworm backports and install it manually using **%%dpkg -i%%**. Download also the backported firmwares:
+  * **[[https://packages.debian.org/bookworm-backports/linux-image-6.12.22+bpo-amd64|linux-image-6.12.22+bpo-amd64_6.12.22-1~bpo12+1_amd64.deb]]**
+  * **[[https://packages.debian.org/bookworm-backports/firmware-amd-graphics|firmware-amd-graphics_20241210-1~bpo12+1_all.deb]]**
+  * **[[https://packages.debian.org/bookworm-backports/firmware-realtek|firmware-realtek_20241210-1~bpo12+1_all.deb]]**
 ===== Problem with audio over HDMI using Pulseaudio and ALSA =====
@@ Line 14: / Line 19: @@
 First of all I manually checked all the following:
-  * Using **alsamixer** unmute the **S/PDIF output** of the **default:1  HD-Audio Generic** sound card.
+  * From **alsamixer**: unmute the **S/PDIF output** of the **default:1  HD-Audio Generic** sound card.
+  * From the **PulseAdio Plugin** on the XFCE panel: check that the master volume control si associated to the **Renoir Radeon High Definition Audio Controller HDMI / DisplayPort 1 Output**, enable the output and set a sensible volume level.
   * Open the XFCE mixer app **pavucontrol**:
-    * Into the **Output Devices** tab check that the **HDMI / DisplayPort 1 Output** is marked as plugged in, //unmuted// and //Set as fallback//.
+    * Into the **Output Devices** tab: check that the **HDMI / DisplayPort 1 Output** is marked as //plugged in//, verify it is //unmuted// and click the //Set as fallback// button.
-    * FIXME: Check the the pavucontrol uses the correct master volume...
+    * Start an audio player (e.g. the **audacious** program to play some mp3 files); into the **Playback** tab of **pavucontrol** check that the app is using the **Renoir Radeon High Definition Audio Controller HDMI / DisplayPort 1 Output** port to route the sound.
-    * Start an audio player (e.g. the **audacious** program to play some mp3 files); into the **Playback** tab of pavucontrol check that the app is using the **HDMI #1** port to route the sound.
 Now you should ear the sound coming from the HDMI display (obviously your device must have the speakers!).
+FIXME There is a problem with the **alsa-restore.service** which should be responsible for saving the ALSA controls status on shutdown and restore them on bootstrap (executing the commands **alsactl store** and **alsactl restore** respectively). Till now I was not able to make the restore working automatically: it seems that the S/PDIF output is muted just before the save, so at bootstrap the alsactl will always restore a muted audio system.