Problem - alsamixer can't control volume.
OS - Yocto based distributive. Problem appear after updating distro. On
early version sound works (thus HW is OK)
!!################################
!!ALSA Information Script v 0.5.3
!!################################
!!Script ran on: Mon Oct 14 12:57:42 UTC 2024
!!Linux Distribution
!!------------------
!!DMI Information
!!---------------
Manufacturer:
Product Name:
Product Version:
Firmware Version:
System SKU:
Board Vendor:
Board Name:
!!ACPI Device Status Information
!!---------------
!!ACPI SoundWire Device Status Information
!!---------------
!!Kernel Information
!!------------------
Kernel release: #1 SMP PREEMPT_RT Mon Oct 14 10:03:35 UTC 2024
Operating System: GNU/Linux
Architecture: aarch64
Processor: unknown
SMP Enabled: Yes
!!ALSA Version
!!------------
Driver version: k6.6.56-rt44-v7l-g8f7f4dd0a2ee-dirty
Library version:
Utilities version: 1.2.11
!!Loaded ALSA modules
!!-------------------
!!Sound Servers on this system
!!----------------------------
No sound servers found.
!!Soundcards recognised by ALSA
!!-----------------------------
0 [MAX98357A ]: simple-card - MAX98357A
MAX98357A
!!PCI Soundcards installed in the system
!!--------------------------------------
!!Modprobe options (Sound related)
!!--------------------------------
snd_bcm2835: enable_headphones=0
snd_bcm2835: enable_hdmi=0
!!Loaded sound module options
!!---------------------------
!!Sysfs card info
!!---------------
!!Card: /sys/class/sound/card0
Driver: /sys/bus/platform/drivers/asoc-simple-card
Tree:
!!ALSA Device nodes
!!-----------------
crw-rw---- 1 root audio 116, 0 Oct 14 12:42 /dev/snd/controlC0
crw-rw---- 1 root audio 116, 16 Oct 14 12:42 /dev/snd/pcmC0D0p
crw-rw---- 1 root audio 116, 33 Oct 14 12:42 /dev/snd/timer
/dev/snd/by-path:
total 0
drwxr-xr-x 2 root root 60 Oct 14 12:42 .
drwxr-xr-x 3 root root 120 Oct 14 12:42 ..
lrwxrwxrwx 1 root root 12 Oct 14 12:42 platform-soc:sound
-> ../controlC0
!!ALSA configuration files
!!------------------------
!!System wide config file (/etc/asound.conf)
pcm.speakerbonnet {
type hw card 0
}
pcm.dmixer {
type dmix
ipc_key 1024
ipc_perm 0666
slave {
pcm "speakerbonnet"
period_time 0
period_size 1024
buffer_size 8192
rate 44100
channels 2
}
}
ctl.dmixer {
type hw card 0
}
pcm.softvol {
type softvol
slave.pcm "dmixer"
control.name "PCM"
control.card 0
}
ctl.softvol {
type hw card 0
}
pcm.!default {
type plug
slave.pcm "softvol"
}
!!Aplay/Arecord output
!!--------------------
APLAY
**** List of PLAYBACK Hardware Devices ****
card 0: MAX98357A [MAX98357A], device 0: fe203000.i2s-HiFi HiFi-0
[fe203000.i2s-HiFi HiFi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
ARECORD
**** List of CAPTURE Hardware Devices ****
!!Amixer output
!!-------------
!!-------Mixer controls for card MAX98357A
Card sysdefault:0 'MAX98357A'/'MAX98357A'
Mixer name : ''
Components : ''
Controls : 0
Simple ctrls : 0
!!Alsactl output
!!--------------
--startcollapse--
state.MAX98357A {
control {
}
}
--endcollapse--
!!All Loaded Modules
!!------------------
af_alg
algif_hash
algif_skcipher
bluetooth
bnep
brcmfmac
brcmfmac_wcc
brcmutil
btbcm
btintel
btqca
btrtl
btsdio
cfg80211
cmac
ecc
ecdh_generic
hci_uart
ipv6
nfnetlink
overlay
phy_generic
rfkill
sch_fq_codel
uio_pdrv_genirq
!!ALSA/HDA dmesg
!!--------------
[ 0.000000] alternatives: applying boot alternatives
[ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=1
snd_bcm2835.enable_headphones=0 snd_bcm2835.enable_hdmi=0
smsc95xx.macaddr=E4:5F:01:4E:13:37 vc_mem.mem_base=0x3ec00000
vc_mem.mem_size=0x40000000 dwc_otg.lpm_enable=0 console=ttyAMA3,115200
root=/dev/mmcblk0p2 rootfstype=ext4 rootwait fbcon=map:10
fbcon=font:SUN12x22 video=DSI-1:1200x1920M@60,rotate=90
[ 0.000000] Dentry cache hash table entries: 262144 (order: 9, 2097152
bytes, linear)
--
[ 0.362339] vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops)
[ 0.363065] vc4_hdmi fef00700.hdmi: 'dmas' DT property is missing or
empty, no HDMI audio
[ 0.363080] vc4-drm gpu: bound fef00700.hdmi (ops vc4_hdmi_ops)
[ 0.363722] vc4_hdmi fef05700.hdmi: 'dmas' DT property is missing or
empty, no HDMI audio
[ 0.363732] vc4-drm gpu: bound fef05700.hdmi (ops vc4_hdmi_ops)
--
[ 2.131441] clk: Disabling unused clocks
[ 2.131826] ALSA device list:
[ 2.131830] #0: MAX98357A
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