!!################################ !!ALSA Information Script v 0.4.65 !!################################ !!Script ran on: Sat Sep 19 18:51:57 UTC 2026 !!Linux Distribution !!------------------ Debian GNU/Linux 11 \n \l PRETTY_NAME="Debian GNU/Linux 11 (bullseye)" NAME="Debian GNU/Linux" ID=debian HOME_URL="https://www.debian.org/" SUPPORT_URL="https://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" !!DMI Information !!--------------- Manufacturer: Product Name: Product Version: Firmware Version: System SKU: Board Vendor: Board Name: !!ACPI Device Status Information !!--------------- !!Kernel Information !!------------------ Kernel release: 6.12.48-v8 Operating System: GNU/Linux Architecture: aarch64 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k6.12.48-v8 Library version: 1.2.4 Utilities version: 1.2.4 !!Loaded ALSA modules !!------------------- snd_bcm2835 vc4 !!Sound Servers on this system !!---------------------------- Pulseaudio: Installed - Yes (/usr/bin/pulseaudio) Running - Yes !!Soundcards recognised by ALSA !!----------------------------- 0 [Headphones ]: bcm2835_headpho - bcm2835 Headphones bcm2835 Headphones 1 [vc4hdmi ]: vc4-hdmi - vc4-hdmi vc4-hdmi !!PCI Soundcards installed in the system !!-------------------------------------- !!Modprobe options (Sound related) !!-------------------------------- snd_pcsp: index=-2 snd_usb_audio: index=-2 snd_atiixp_modem: index=-2 snd_intel8x0m: index=-2 snd_via82xx_modem: index=-2 snd_bcm2835: enable_headphones=0 snd_bcm2835: enable_headphones=1 snd_bcm2835: enable_hdmi=1 snd_bcm2835: enable_hdmi=0 !!Loaded sound module options !!--------------------------- !!Module: snd_bcm2835 enable_hdmi : N enable_headphones : Y force_bulk : N num_channels : 8 !!Module: vc4 fkms_max_refresh_rate : 85 force_hotplug : 0 tv_norm : !!ALSA Device nodes !!----------------- crw-rw---- 1 root audio 116, 3 Sep 19 19:34 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 5 Sep 19 19:34 /dev/snd/controlC1 crw-rw---- 1 root audio 116, 2 Sep 19 19:34 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 4 Sep 19 19:34 /dev/snd/pcmC1D0p crw-rw---- 1 root audio 116, 1 Sep 19 19:34 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Sep 19 19:34 /dev/snd/timer /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 80 Sep 19 19:34 . drwxr-xr-x 3 root root 180 Sep 19 19:34 .. lrwxrwxrwx 1 root root 12 Sep 19 19:34 platform-3f00b840.mailbox -> ../controlC0 lrwxrwxrwx 1 root root 12 Sep 19 19:34 platform-3f902000.hdmi -> ../controlC1 !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones] Subdevices: 8/8 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 Subdevice #4: subdevice #4 Subdevice #5: subdevice #5 Subdevice #6: subdevice #6 Subdevice #7: subdevice #7 card 1: vc4hdmi [vc4-hdmi], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 ARECORD **** List of CAPTURE Hardware Devices **** !!Amixer output !!------------- !!-------Mixer controls for card Headphones Card hw:0 'Headphones'/'bcm2835 Headphones' Mixer name : 'Broadcom Mixer' Components : '' Controls : 2 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback 96 [97%] [0.96dB] [on] !!-------Mixer controls for card vc4hdmi Card hw:1 'vc4hdmi'/'vc4-hdmi' Mixer name : '' Components : '' Controls : 6 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume Playback channels: Front Left - Front Right Limits: Playback 0 - 255 Mono: Front Left: Playback 255 [100%] [0.00dB] Front Right: Playback 255 [100%] [0.00dB] !!Alsactl output !!-------------- --startcollapse-- state.Headphones { control.1 { iface MIXER name 'PCM Playback Volume' value 96 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 96 } } control.2 { iface MIXER name 'PCM Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } } state.vc4hdmi { control.1 { iface CARD name 'HDMI Jack' value true comment { access read type BOOLEAN count 1 } } control.2 { iface PCM name 'Playback Channel Map' value.0 0 value.1 0 value.2 0 value.3 0 value.4 0 value.5 0 value.6 0 value.7 0 comment { access 'read volatile' type INTEGER count 8 range '0 - 36' } } control.3 { iface PCM name 'IEC958 Playback Mask' value ffffffffffffffffffffffffffffffffffffffffffffffff0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 comment { access read type IEC958 count 1 } } control.4 { iface PCM name 'IEC958 Playback Default' value '0482000200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read write' type IEC958 count 1 } } control.5 { iface PCM name ELD value '100008006c1000010000000000000000215736184d4143524f53494c49434f4e097f07000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read volatile' type BYTES count 128 } } control.6 { iface MIXER name 'PCM Playback Volume' value.0 255 value.1 255 comment { access 'read write user' type INTEGER count 2 range '0 - 255' tlv '0000000100000008ffffec1400000014' dbmin -5100 dbmax 0 dbvalue.0 0 dbvalue.1 0 } } } --endcollapse-- !!All Loaded Modules !!------------------ 8021q aes_arm64 aes_generic af_alg algif_hash algif_skcipher backlight bcm2835_codec bcm2835_isp bcm2835_mmal_vchiq bcm2835_v4l2 bluetooth bnep brcmfmac brcmfmac_wcc brcmutil btbcm btintel btmtk btrtl btusb cec cfg80211 cmac drm drm_display_helper drm_dma_helper drm_kms_helper drm_panel_orientation_quirks ecc ecdh_generic fuse garp i2c_bcm2835 i2c_dev ip_tables ipv6 libaes llc lz4_compress mc raspberrypi_gpiomem rfcomm rfkill sg snd snd_bcm2835 snd_compress snd_pcm snd_pcm_dmaengine snd_soc_core snd_soc_hdmi_codec snd_timer stp uinput uio uio_pdrv_genirq v4l2_mem2mem vc4 vc_sm_cma videobuf2_common videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev x_tables zram !!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 cgroup_disable=memory snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 snd_bcm2835.enable_hdmi=0 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyAMA0,115200 console=tty1 root=PARTUUID=1e2d3ad7-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles [ 0.000000] cgroup: Disabling memory control group subsystem -- [ 7.355686] mc: Linux media interface: v0.10 [ 7.435483] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 7.465950] bcm2835-audio bcm2835-audio: card created with 8 channels -- [ 8.208828] input: vc4-hdmi as /devices/platform/soc/3f902000.hdmi/rc/rc0/input0 [ 8.220513] input: vc4-hdmi HDMI Jack as /devices/platform/soc/3f902000.hdmi/sound/card1/input1 [ 8.222139] vc4-drm soc:gpu: bound 3f902000.hdmi (ops vc4_hdmi_ops [vc4]) -- [ 4163.614423] WARNING: CPU: 3 PID: 798 at drivers/gpu/drm/vc4/vc4_hdmi.c:726 vc4_hdmi_write_infoframe 0x3ec/0x468 [vc4] [ 4163.614533] Modules linked in: uinput rfcomm sg cmac algif_hash aes_arm64 aes_generic algif_skcipher af_alg bnep zram 8021q lz4_compress garp stp llc brcmfmac_wcc btusb btrtl vc4 brcmfmac btintel btmtk btbcm bluetooth snd_soc_hdmi_codec drm_display_helper cec brcmutil drm_dma_helper ecdh_generic ecc drm_kms_helper libaes cfg80211 snd_soc_core snd_compress snd_pcm_dmaengine bcm2835_codec(C) bcm2835_v4l2(C) rfkill bcm2835_isp(C) bcm2835_mmal_vchiq(C) vc_sm_cma(C) v4l2_mem2mem videobuf2_vmalloc videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videodev snd_bcm2835(C) snd_pcm videobuf2_common mc snd_timer i2c_bcm2835 snd raspberrypi_gpiomem uio_pdrv_genirq uio i2c_dev drm drm_panel_orientation_quirks backlight fuse ip_tables x_tables ipv6 [ 4163.614921] CPU: 3 UID: 1000 PID: 798 Comm: alsa-sink-MAI P Tainted: G C 6.12.48-v8 #1906 -- [ 4163.615513] vc4_hdmi_audio_prepare 0x544/0xf70 [vc4] [ 4163.615589] hdmi_codec_prepare 0xd8/0x138 [snd_soc_hdmi_codec] [ 4163.615607] snd_soc_pcm_dai_prepare 0x80/0x120 [snd_soc_core] [ 4163.615755] __soc_pcm_prepare 0x4c/0x120 [snd_soc_core] [ 4163.615875] soc_pcm_prepare 0x38/0x68 [snd_soc_core] [ 4163.615994] snd_pcm_do_prepare 0x38/0x60 [snd_pcm] [ 4163.616067] snd_pcm_action_single 0x50/0xb8 [snd_pcm] [ 4163.616128] snd_pcm_action_nonatomic 0xa8/0xb8 [snd_pcm] [ 4163.616188] snd_pcm_prepare 0x94/0xf8 [snd_pcm] [ 4163.616248] snd_pcm_common_ioctl 0xdb8/0x16b0 [snd_pcm] [ 4163.616309] snd_pcm_ioctl 0x38/0x58 [snd_pcm] [ 4163.616369] __arm64_sys_ioctl 0xb0/0x100 !!Packages installed !!-------------------- ii alsa-topology-conf 1.2.4-1 all ALSA topology configuration files ii alsa-ucm-conf 1.2.4-2 all ALSA Use Case Manager configuration files ii alsa-utils 1.2.4-1 rpt1 arm64 Utilities for configuring and using ALSA