# HummingBoard Pulse & i.MX8M Plus missing audio devices **URL:** \ **Category:** NXP i.MX8M Plus\ **Created:** [February 16, 2022, 3:30pm UTC](https://community.solid-run.com/t/hummingboard-pulse-i-mx8m-plus-missing-audio-devices/244 "2022-02-16T15:30:38Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![j-licht](https://avatars.discourse-cdn.com/v4/letter/j/bcef8e/32.png) [@j-licht](https://community.solid-run.com/u/j-licht)\ **Post date:** [February 16, 2022, 3:30pm UTC](https://community.solid-run.com/t/hummingboard-pulse-i-mx8m-plus-missing-audio-devices/244/1 "2022-02-16T15:30:38Z")
Hi, I’m missing the audio devices on my HummingBoard Pulse & i.MX8M Plus. I’m using the yocto gatesgarth imx8mpsolidrun image provided by solidrun. aplay -L only display the null and die pulse audio interface, no hardware audio interfaces. I found some messages around the audio interfaces in dmesg: ```auto [1.827337] fsl-sai 30c30000.sai: failed to get bus clock: -517 [1.835206] fsl-easrc 30c90000.easrc: failed to get mem clock [1.843562] imx-cdnhdmi sound-hdmi: failed to find SAI platform device [1.850122] imx-cdnhdmi: probe of sound-hdmi failed with error -22 [6.213189] wm8904 1-001a: supply DCVDD not found, using dummy regulator [6.218952] basler_camera_driver_vvcam: loading out-of-tree module taints kernel. [6.222899] at24 0-0050: 256 byte 24c02 EEPROM, writable, 16 bytes/write [6.223725] wm8904 1-001a: supply DBVDD not found, using dummy regulator [6.223769] wm8904 1-001a: supply AVDD not found, using dummy regulator [6.223807] wm8904 1-001a: supply CPVDD not found, using dummy regulator [6.223845] wm8904 1-001a: supply MICVDD not found, using dummy regulator [6.230431] wm8904 1-001a: Failed to read ID register: -6 ``` Complete dmesg output:[https://pastebin.com/rZ5BkNmf](https://pastebin.com/rZ5BkNmf) Did you have any ideas what could be the problem Best regards, Jonas ---
**Author:** ![jnettlet](https://dub1.discourse-cdn.com/flex005/user_avatar/community.solid-run.com/jnettlet/32/62_2.png) [@jnettlet](https://community.solid-run.com/u/jnettlet)\ **Post date:** [February 16, 2022, 3:37pm UTC](https://community.solid-run.com/t/hummingboard-pulse-i-mx8m-plus-missing-audio-devices/244/2 "2022-02-16T15:37:10Z")
Support for this hardware has been added in our upcoming hardknott yocto release, and should be able to be integrated into gategarth as well. The kernel repository is here [GitHub - SolidRun/linux-stable at lf-5.10.72-2.2.0-sr](https://github.com/SolidRun/linux-stable/tree/lf-5.10.72-2.2.0-sr) and the meta layer and official image will be out this week. ---
**Author:** ![weihung](https://avatars.discourse-cdn.com/v4/letter/w/e480ec/32.png) [@weihung](https://community.solid-run.com/u/weihung)\ **Post date:** [October 25, 2022, 7:19am UTC](https://community.solid-run.com/t/hummingboard-pulse-i-mx8m-plus-missing-audio-devices/244/3 "2022-10-25T07:19:51Z")
I still get into trouble with audio playback using your pre-built image, imx8mp\_yocto\_hardknott-5.10.72-2.2.0/imx-image-full-imx8mpsolidrun-20220225.rootfs.wic.bz2. wm8904 is found by gst-device-monitor-1.0 ```auto Device found: name : wm8904-audio class : Audio/Sink caps : audio/x-raw, format={ (string)S32LE, (string)S24_32LE, (string)S16LE }, layout=interleaved, rate=[8000, 96000], channels=2, channel-mask=0x0000000000000003 properties: device.api = alsa device.class = sound alsa.card = 1 alsa.card_name = wm8904-audio alsa.driver_name = wm8904-audio alsa.name = wm8904-audio alsa.id = wm8904audio alsa.mixername = "" alsa.components = "" gst-launch-1.0 ... ! alsasink device="hw:1\,0" ``` but the process of playing audio test is failed as below. ```auto root@imx8mpsolidrun:~# gst-launch-1.0 audiotestsrc ! alsasink device="hw:1\,0" Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstAlsaSink:alsasink0: Could not get/set settings from/on resource. Additional debug info: ../git/ext/alsa/gstalsasink.c(658): set_hwparams (): /GstPipeline:pipeline0/GstAlsaSink:alsasink0: Unable to set hw params for playback: Invalid argument ERROR: pipeline doesn't want to preroll. ERROR: from element /GstPipeline:pipeline0/GstAlsaSink:alsasink0: Could not get/set settings from/on resource. Setting pipeline to NULL ... Additional debug info: ../git/ext/alsa/gstalsasink.c(982): gst_alsasink_prepare (): /GstPipeline:pipeline0/GstAlsaSink:alsasink0: Setting of hwparams failed: Invalid argument ERROR: pipeline doesn't want to preroll. Freeing pipeline ... ``` In addition, pactl doesn’t find wm8904. ```auto root@imx8mpsolidrun:~# pactl list sinks Sink #0 State: SUSPENDED Name: alsa_output.platform-sound-hdmi.stereo-fallback Description: Built-in Audio Stereo Driver: module-alsa-card.c Sample Specification: s32le 2ch 44100Hz Channel Map: front-left,front-right Owner Module: 6 Mute: no Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB balance 0.00 Base Volume: 65536 / 100% / 0.00 dB Monitor Source: alsa_output.platform-sound-hdmi.stereo-fallback.monitor Latency: 0 usec, configured 0 usec Flags: HARDWARE DECIBEL_VOLUME LATENCY Properties: alsa.resolution_bits = "24" device.api = "alsa" device.class = "sound" alsa.class = "generic" alsa.subclass = "generic-mix" alsa.name = "imx8 hdmi i2s-hifi-0" alsa.id = "imx8 hdmi i2s-hifi-0" alsa.subdevice = "0" alsa.subdevice_name = "subdevice #0" alsa.device = "0" alsa.card = "0" alsa.card_name = "audio-hdmi" alsa.long_card_name = "audio-hdmi" alsa.driver_name = "snd_soc_imx_cdnhdmi" device.bus_path = "platform-sound-hdmi" sysfs.path = "/devices/platform/sound-hdmi/sound/card0" device.form_factor = "internal" device.string = "hw:0" device.buffering.buffer_size = "35264" device.buffering.fragment_size = "8816" device.access_mode = "mmap" device.profile.name = "stereo-fallback" device.profile.description = "Stereo" device.description = "Built-in Audio Stereo" module-udev-detect.discovered = "1" device.icon_name = "audio-card" Ports: analog-output: Analog Output (type: Analog, priority: 9900, availability unknown) Active Port: analog-output Formats: pcm ``` Is there any article such as Audio Quick Start in your wiki?