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tuxrouge

Member

Registered: 2025-06-16

Posts: 2

sound dummy output

I have no sound on my laptop (chromebook). With gnome desktop
I only have the dummy output option. I have the impression that my sound card is correctly recognised but is not selected by default.
If I plug in headphones, the sound works but on the speakers.

$ fuser -v /dev/snd/*
                     UTIL.       PID ACCÈS  COMMANDE
/dev/snd/controlC0:  mathieu    1921 F.... wireplumber
/dev/snd/seq:        mathieu    1920 F.... pipewire
$ aplay -L | grep -i -A2 sysdefault
sysdefault:CARD=sofrt5682
    sof-rt5682, 
    Default Audio Device
$ cat /proc/asound/cards
 0 [sofrt5682      ]: sof-rt5682 - sof-rt5682
                      Google-Eldrid-rev3

Last edited by tuxrouge (2025-06-16 15:31:16)

jl2

Member

From: 47° 18' N 8° 34' E

Registered: 2022-06-01

Posts: 769

Re: sound dummy output

Did you set up a sound server? (if in doubt set up PipeWire)

What's the output of 'wpctl status' and 'pactl list sinks'?

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And to let my siblings and cousins laugh at Arsch Linux...

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tuxrouge

Member

Registered: 2025-06-16

Posts: 2

Re: sound dummy output

Hi
I think I did

$ wpctl status
PipeWire 'pipewire-0' [1.4.5, titi@titi-eldrid, cookie:2229380708]
 └─ Clients:
        32. gnome-shell                         [1.4.5, titi@titi-eldrid, pid:1415]
        33. WirePlumber                         [1.4.5, titi@titi-eldrid, pid:1921]
        38. pipewire                            [1.4.5, titi@titi-eldrid, pid:1922]
        47. WirePlumber [export]                [1.4.5, titi@titi-eldrid, pid:1921]
        48. GNOME Shell Volume Control          [1.4.5, titi@titi-eldrid, pid:1415]
        49. GNOME Volume Control Media Keys     [1.4.5, titi@titi-eldrid, pid:1537]
        59. xdg-desktop-portal                  [1.4.5, titi@titi-eldrid, pid:1761]
        62. Mutter                              [1.4.5, titi@titi-eldrid, pid:1415]
        63. gsd-power                           [1.4.5, titi@titi-eldrid, pid:1541]
        64. Firefox                             [1.4.5, titi@titi-eldrid, pid:2324]
        67. wpctl                               [1.4.5, titi@titi-eldrid, pid:8216]
        70. Firefox                             [1.4.5, titi@titi-eldrid, pid:2324]

Audio
 ├─ Devices:
 │      50. Tiger Lake-LP Smart Sound Technology Audio Controller [alsa]
 │  
 ├─ Sinks:
 │  *   39. Dummy Output                        [vol: 0.42]
 │  
 ├─ Sources:
 │  
 ├─ Filters:
 │  
 └─ Streams:

Video
 ├─ Devices:
 │      57. HP Wide Vision HD Camera            [v4l2]
 │      58. HP Wide Vision HD Camera            [v4l2]
 │  
 ├─ Sinks:
 │  
 ├─ Sources:
 │  *   60. HP Wide Vision HD Camera (V4L2)    
 │  
 ├─ Filters:
 │  
 └─ Streams:

Settings
 └─ Default Configured Devices:
[titi@titi-eldrid ~]$ pactl list sinks
Sink #39
	State: SUSPENDED
	Name: auto_null
	Description: Dummy Output
	Driver: PipeWire
	Sample Specification: float32le 2ch 48000Hz
	Channel Map: front-left,front-right
	Owner Module: 4294967295
	Mute: no
	Volume: front-left: 27788 /  42% / -22,36 dB,   front-right: 27788 /  42% / -22,36 dB
	        balance 0,00
	Base Volume: 65536 / 100% / 0,00 dB
	Monitor Source: auto_null.monitor
	Latency: 0 usec, configured 0 usec
	Flags: DECIBEL_VOLUME LATENCY 
	Properties:
		node.name = "auto_null"
		device.description = "Dummy Output"
		audio.rate = "48000"
		audio.channels = "2"
		audio.position = "FL,FR"
		media.class = "Audio/Sink"
		factory.name = "support.null-audio-sink"
		node.virtual = "true"
		monitor.channel-volumes = "true"
		factory.id = "19"
		clock.quantum-limit = "8192"
		client.id = "38"
		node.driver = "true"
		port.group = "stream.0"
		node.loop.name = "data-loop.0"
		library.name = "audioconvert/libspa-audioconvert"
		object.id = "39"
		object.serial = "39"
	Formats:
		pcm

and alsa script give it to me https://alsa-project.org/db/?f=f9bc0f0f … bfb8e95e4a

Last edited by tuxrouge (2025-06-17 19:02:27)