!!################################ !!ALSA Information Script v 0.5.1 !!################################ !!Script ran on: Wed Nov 5 21:46:55 UTC 2025 !!Linux Distribution !!------------------ Debian GNU/Linux 12 \n \l PRETTY_NAME="Debian GNU/Linux 12 (bookworm)" 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: 6.12.47 rpt-rpi-v8 Operating System: GNU/Linux Architecture: aarch64 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k6.12.47 rpt-rpi-v8 Library version: 1.2.8 Utilities version: 1.2.8 !!Loaded ALSA modules !!------------------- snd_bcm2835 (card 0) snd_bcm2835 (card 1) snd_bcm2835 (card 2) !!Sound Servers on this system !!---------------------------- No sound servers found. !!Soundcards recognised by ALSA !!----------------------------- 0 [b1 ]: bcm2835_hdmi - bcm2835 HDMI 1 bcm2835 HDMI 1 1 [b2 ]: bcm2835_hdmi - bcm2835 HDMI 2 bcm2835 HDMI 2 2 [Headphones ]: bcm2835_headpho - bcm2835 Headphones bcm2835 Headphones !!PCI Soundcards installed in the system !!-------------------------------------- !!Modprobe options (Sound related) !!-------------------------------- snd_pcsp: 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 !!Loaded sound module options !!--------------------------- !!Module: snd_bcm2835 enable_hdmi : Y enable_headphones : Y force_bulk : N num_channels : 8 !!Module: snd_bcm2835 enable_hdmi : Y enable_headphones : Y force_bulk : N num_channels : 8 !!Module: snd_bcm2835 enable_hdmi : Y enable_headphones : Y force_bulk : N num_channels : 8 !!Sysfs card info !!--------------- !!Card: /sys/class/sound/card0 Driver: /sys/bus/vchiq-bus/drivers/bcm2835-audio Tree: /sys/class/sound/card0 |-- controlC0 | |-- dev | |-- device -> ../../card0 | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- device -> ../../../bcm2835-audio |-- id |-- number |-- pcmC0D0p | |-- dev | |-- device -> ../../card0 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- pcmC0D1p | |-- dev | |-- device -> ../../card0 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- power | |-- autosuspend_delay_ms | |-- control | |-- runtime_active_time | |-- runtime_status | `-- runtime_suspended_time |-- subsystem -> ../../../../../../../class/sound `-- uevent !!Card: /sys/class/sound/card1 Driver: /sys/bus/vchiq-bus/drivers/bcm2835-audio Tree: /sys/class/sound/card1 |-- controlC1 | |-- dev | |-- device -> ../../card1 | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- device -> ../../../bcm2835-audio |-- id |-- number |-- pcmC1D0p | |-- dev | |-- device -> ../../card1 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- pcmC1D1p | |-- dev | |-- device -> ../../card1 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- power | |-- autosuspend_delay_ms | |-- control | |-- runtime_active_time | |-- runtime_status | `-- runtime_suspended_time |-- subsystem -> ../../../../../../../class/sound `-- uevent !!Card: /sys/class/sound/card2 Driver: /sys/bus/vchiq-bus/drivers/bcm2835-audio Tree: /sys/class/sound/card2 |-- controlC2 | |-- dev | |-- device -> ../../card2 | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- device -> ../../../bcm2835-audio |-- id |-- number |-- pcmC2D0p | |-- dev | |-- device -> ../../card2 | |-- pcm_class | |-- power | |-- subsystem -> ../../../../../../../../class/sound | `-- uevent |-- power | |-- autosuspend_delay_ms | |-- control | |-- runtime_active_time | |-- runtime_status | `-- runtime_suspended_time |-- subsystem -> ../../../../../../../class/sound `-- uevent !!ALSA Device nodes !!----------------- crw-rw---- 1 root audio 116, 4 Nov 5 22:09 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 7 Nov 5 22:09 /dev/snd/controlC1 crw-rw---- 1 root audio 116, 9 Nov 5 22:09 /dev/snd/controlC2 crw-rw---- 1 root audio 116, 2 Nov 5 22:09 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 3 Nov 5 22:09 /dev/snd/pcmC0D1p crw-rw---- 1 root audio 116, 5 Nov 5 22:09 /dev/snd/pcmC1D0p crw-rw---- 1 root audio 116, 6 Nov 5 22:09 /dev/snd/pcmC1D1p crw-rw---- 1 root audio 116, 8 Nov 5 22:09 /dev/snd/pcmC2D0p crw-rw---- 1 root audio 116, 1 Nov 5 22:09 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Nov 5 22:09 /dev/snd/timer /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 60 Nov 5 22:09 . drwxr-xr-x 3 root root 260 Nov 5 22:09 .. lrwxrwxrwx 1 root root 12 Nov 5 22:09 platform-fe00b840.mailbox -> ../controlC0 !!ALSA configuration files !!------------------------ !!User specific config file (~/.asoundrc) pcm.!default { type asym playback.pcm { type plug slave.pcm "output" } capture.pcm { type plug slave.pcm "input" } } pcm.output { type hw card 2 } ctl.!default { type hw card 2 } !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1] Subdevices: 4/4 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 Subdevice #2: subdevice #2 Subdevice #3: subdevice #3 card 0: b1 [bcm2835 HDMI 1], device 1: bcm2835 HDMI 1 [bcm2835 HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: b2 [bcm2835 HDMI 2], device 0: bcm2835 HDMI 2 [bcm2835 HDMI 2] Subdevices: 2/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 card 1: b2 [bcm2835 HDMI 2], device 1: bcm2835 HDMI 2 [bcm2835 HDMI 2] Subdevices: 1/1 Subdevice #0: subdevice #0 card 2: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones] Subdevices: 1/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 ARECORD **** List of CAPTURE Hardware Devices **** !!Amixer output !!------------- !!-------Mixer controls for card b1 Card sysdefault:0 'b1'/'bcm2835 HDMI 1' Mixer name : 'Broadcom Mixer' Components : '' Controls : 4 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback -10239 [0%] [-99999.99dB] [on] !!-------Mixer controls for card b2 Card sysdefault:1 'b2'/'bcm2835 HDMI 2' Mixer name : 'Broadcom Mixer' Components : '' Controls : 4 Simple ctrls : 1 Simple mixer control 'PCM',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined Playback channels: Mono Limits: Playback -10239 - 400 Mono: Playback 0 [96%] [0.00dB] [on] !!-------Mixer controls for card Headphones Card sysdefault:2 '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 400 [100%] [4.00dB] [on] !!Alsactl output !!-------------- --startcollapse-- state.b1 { control.1 { iface MIXER name 'PCM Playback Volume' value -10239 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 -9999999 } } control.2 { iface MIXER name 'PCM Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } control.3 { iface PCM name 'IEC958 Playback Default' value '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read write' type IEC958 count 1 } } control.4 { iface PCM name 'IEC958 Playback Con Mask' value '0200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access read type IEC958 count 1 } } } state.b2 { control.1 { iface MIXER name 'PCM Playback Volume' value 0 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 0 } } control.2 { iface MIXER name 'PCM Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } control.3 { iface PCM name 'IEC958 Playback Default' value '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read write' type IEC958 count 1 } } control.4 { iface PCM name 'IEC958 Playback Con Mask' value '0200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access read type IEC958 count 1 } } } state.Headphones { control.1 { iface MIXER name 'PCM Playback Volume' value 400 comment { access 'read write' type INTEGER count 1 range '-10239 - 400' dbmin -9999999 dbmax 400 dbvalue.0 400 } } control.2 { iface MIXER name 'PCM Playback Switch' value true comment { access 'read write' type BOOLEAN count 1 } } } --endcollapse-- !!All Loaded Modules !!------------------ backlight bcm2835_codec bcm2835_isp bcm2835_mmal_vchiq bcm2835_v4l2 binfmt_misc bluetooth brcmfmac brcmfmac_wcc brcmutil btbcm cec cfg80211 dm_mod drm drm_display_helper drm_dma_helper drm_kms_helper drm_panel_orientation_quirks drm_shmem_helper ecc ecdh_generic fuse gpu_sched hci_uart i2c_bcm2835 i2c_dev ip_tables ipv6 libaes mc nf_conntrack nf_defrag_ipv4 nf_defrag_ipv6 nf_nat nf_tables nfnetlink nft_chain_nat nft_compat nvmem_rmem raspberrypi_gpiomem raspberrypi_hwmon rfkill rpi_hevc_dec snd snd_bcm2835 snd_compress snd_pcm snd_pcm_dmaengine snd_soc_bcm2835_i2s snd_soc_core snd_soc_hdmi_codec snd_timer tun uio uio_pdrv_genirq v3d v4l2_mem2mem vc4 vc_sm_cma videobuf2_common videobuf2_dma_contig videobuf2_memops videobuf2_v4l2 videobuf2_vmalloc videodev x_tables xt_MASQUERADE xt_mark xt_tcpudp !!ALSA/HDA dmesg !!-------------- [ 0.000000] alternatives: applying boot alternatives [ 0.000000] Kernel command line: coherent_pool=1M 8250.nr_uarts=0 snd_bcm2835.enable_headphones=0 cgroup_disable=memory numa_policy=interleave nvme.max_host_mem_size_mb=0 snd_bcm2835.enable_headphones=1 snd_bcm2835.enable_hdmi=1 clk_ignore_unused numa=fake=2 system_heap.max_order=0 smsc95xx.macaddr=D8:3A:DD:94:69:14 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=ttyS0,115200 console=tty1 root=PARTUUID=989e6c2b-02 rootfstype=ext4 fsck.repair=yes rootwait [ 0.000000] cgroup: Disabling memory control group subsystem -- [ 1.780417] systemd[1]: Detected architecture arm64. [ 1.794404] systemd[1]: Hostname set to . [ 2.233407] systemd[1]: Queued start job for default target multi-user.target. -- [ 3.457819] vc_sm_cma: module is from the staging directory, the quality is unknown, you have been warned. [ 3.472229] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 3.479067] bcm2835_vc_sm_cma_probe: Videocore shared memory driver -- [ 3.487102] [vc_sm_connected_init]: installed successfully [ 3.491874] bcm2835-audio bcm2835-audio: card created with 4 channels [ 3.497726] bcm2835_mmal_vchiq: module is from the staging directory, the quality is unknown, you have been warned. [ 3.504005] v3d fec00000.v3d: [drm] Transparent Hugepage support is recommended for optimal performance on this platform! [ 3.507878] bcm2835-audio bcm2835-audio: card created with 2 channels [ 3.510043] bcm2835_isp: module is from the staging directory, the quality is unknown, you have been warned. -- [ 3.534635] systemd[1]: Found device dev-disk-by\x2dpartuuid-989e6c2b\x2d01.device - /dev/disk/by-partuuid/989e6c2b-01. [ 3.535344] bcm2835-audio bcm2835-audio: card created with 2 channels [ 3.539187] bcm2835_v4l2: module is from the staging directory, the quality is unknown, you have been warned. -- [ 10.751542] bcmgenet fd580000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx [ 480.354475] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) [ 634.391022] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) [ 945.155909] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) [ 1172.980332] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) [ 1429.632762] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) [ 1446.603706] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) [ 1489.602091] bcm2835-audio bcm2835-audio: failed to close VCHI service connection (status=-11) !!Packages installed !!-------------------- ii alsa-topology-conf 1.2.5.1-2 all ALSA topology configuration files ii alsa-ucm-conf 1.2.8-1 all ALSA Use Case Manager configuration files ii alsa-utils 1.2.8-1 rpt1 arm64 Utilities for configuring and using ALSA hi bluez-alsa-utils 4.2.0-2moode1 arm64 Bluetooth Audio ALSA Backend (utils)