!!################################ !!ALSA Information Script v 0.5.1 !!################################ !!Script ran on: Wed Apr 15 08:15:26 UTC 2026 !!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: 6.12.75 rpt-rpi-v8 Operating System: GNU/Linux Architecture: aarch64 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k6.12.75 rpt-rpi-v8 Library version: 1.2.8 Utilities version: 1.2.8 !!Loaded ALSA modules !!------------------- vc4 (card 0) vc4 (card 1) !!Sound Servers on this system !!---------------------------- PipeWire: Installed - Yes (/usr/bin/pipewire) Running - Yes Pulseaudio: Installed - Yes (/usr/bin/pulseaudio) Running - No !!Soundcards recognised by ALSA !!----------------------------- 0 [vc4hdmi0 ]: vc4-hdmi - vc4-hdmi-0 vc4-hdmi-0 1 [vc4hdmi1 ]: vc4-hdmi - vc4-hdmi-1 vc4-hdmi-1 !!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_hdmi=1 snd_bcm2835: enable_hdmi=0 !!Loaded sound module options !!--------------------------- !!Module: vc4 fkms_max_refresh_rate : 85 force_hotplug : 0 tv_norm : !!Module: vc4 fkms_max_refresh_rate : 85 force_hotplug : 0 tv_norm : !!Sysfs card info !!--------------- !!Card: /sys/class/sound/card0 Driver: /sys/bus/platform/drivers/vc4_hdmi Tree: /sys/class/sound/card0 |-- controlC0 | |-- dev | |-- device -> ../../card0 | |-- power | |-- subsystem -> ../../../../../../../class/sound | `-- uevent |-- device -> ../../../fef00700.hdmi |-- id |-- input4 | |-- capabilities | |-- device -> ../../card0 | |-- event4 | |-- id | |-- inhibited | |-- modalias | |-- name | |-- phys | |-- power | |-- properties | |-- subsystem -> ../../../../../../../class/input | |-- uevent | `-- uniq |-- number |-- pcmC0D0p | |-- 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/platform/drivers/vc4_hdmi Tree: /sys/class/sound/card1 |-- controlC1 | |-- dev | |-- device -> ../../card1 | |-- power | |-- subsystem -> ../../../../../../../class/sound | `-- uevent |-- device -> ../../../fef05700.hdmi |-- id |-- input6 | |-- capabilities | |-- device -> ../../card1 | |-- event6 | |-- id | |-- inhibited | |-- modalias | |-- name | |-- phys | |-- power | |-- properties | |-- subsystem -> ../../../../../../../class/input | |-- uevent | `-- uniq |-- number |-- pcmC1D0p | |-- 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 !!ALSA Device nodes !!----------------- crw-rw---- 1 root audio 116, 3 Apr 11 20:33 /dev/snd/controlC0 crw-rw---- 1 root audio 116, 5 Apr 11 20:33 /dev/snd/controlC1 crw-rw---- 1 root audio 116, 2 Apr 11 20:33 /dev/snd/pcmC0D0p crw-rw---- 1 root audio 116, 4 Apr 11 20:33 /dev/snd/pcmC1D0p crw-rw---- 1 root audio 116, 1 Apr 11 20:33 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Apr 11 20:33 /dev/snd/timer /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 80 Apr 11 20:33 . drwxr-xr-x 3 root root 180 Apr 11 20:33 .. lrwxrwxrwx 1 root root 12 Apr 11 20:33 platform-fef00700.hdmi -> ../controlC0 lrwxrwxrwx 1 root root 12 Apr 11 20:33 platform-fef05700.hdmi -> ../controlC1 !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** card 0: vc4hdmi0 [vc4-hdmi-0], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: vc4hdmi1 [vc4-hdmi-1], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0] Subdevices: 0/1 Subdevice #0: subdevice #0 ARECORD **** List of CAPTURE Hardware Devices **** !!Amixer output !!------------- !!-------Mixer controls for card vc4hdmi0 Card sysdefault:0 'vc4hdmi0'/'vc4-hdmi-0' Mixer name : '' Components : '' Controls : 5 Simple ctrls : 0 !!-------Mixer controls for card vc4hdmi1 Card sysdefault:1 'vc4hdmi1'/'vc4-hdmi-1' Mixer name : '' Components : '' Controls : 5 Simple ctrls : 0 !!Alsactl output !!-------------- --startcollapse-- state.vc4hdmi0 { control.1 { iface CARD name 'HDMI Jack' value false 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 '0400000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read write' type IEC958 count 1 } } control.5 { iface PCM name ELD value '0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read volatile' type BYTES count 128 } } } state.vc4hdmi1 { 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 3 value.1 4 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 locked' type IEC958 count 1 } } control.5 { iface PCM name ELD value '100008006a22000100000000000000003e4e3000434c42343042393632530907071117500000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000' comment { access 'read volatile' type BYTES count 128 } } } --endcollapse-- !!All Loaded Modules !!------------------ aes_arm64 aes_generic af_alg algif_hash algif_skcipher backlight bcm2835_codec bcm2835_isp bcm2835_mmal_vchiq bcm2835_v4l2 binfmt_misc bluetooth bnep br_netfilter brcmfmac brcmfmac_wcc brcmutil bridge btbcm cec cfg80211 cmac 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_brcmstb i2c_dev ip_tables ipv6 ledtrig_pattern libaes llc mc nf_conntrack nf_conntrack_netlink nf_defrag_ipv4 nf_defrag_ipv6 nf_nat nf_tables nfnetlink nft_chain_nat nft_compat nvmem_rmem overlay raspberrypi_gpiomem raspberrypi_hwmon rfcomm rfkill rpi_hevc_dec sg snd snd_bcm2835 snd_compress snd_hrtimer snd_pcm snd_pcm_dmaengine snd_seq snd_seq_device snd_seq_dummy snd_soc_core snd_soc_hdmi_codec snd_timer stp 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 xfrm_algo xfrm_user xt_MASQUERADE xt_addrtype xt_conntrack !!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_hdmi=1 snd_bcm2835.enable_hdmi=0 numa=fake=2 system_heap.max_order=0 smsc95xx.macaddr=E4:5F:01:44:83:B4 vc_mem.mem_base=0x3ec00000 vc_mem.mem_size=0x40000000 console=tty1 root=PARTUUID=f35f1781-02 rootfstype=ext4 fsck.repair=yes rootwait cfg80211.ieee80211_regdom=DE [ 0.000000] cgroup: Disabling memory control group subsystem -- [ 4.008934] mc: Linux media interface: v0.10 [ 4.014173] snd_bcm2835: module is from the staging directory, the quality is unknown, you have been warned. [ 4.019776] vc4-drm gpu: bound fe400000.hvs (ops vc4_hvs_ops [vc4]) -- [ 4.135865] input: vc4-hdmi-0 as /devices/platform/soc/fef00700.hdmi/rc/rc0/input3 [ 4.139726] input: vc4-hdmi-0 HDMI Jack as /devices/platform/soc/fef00700.hdmi/sound/card0/input4 [ 4.140115] vc4-drm gpu: bound fef00700.hdmi (ops vc4_hdmi_ops [vc4]) -- [ 4.141846] input: vc4-hdmi-1 as /devices/platform/soc/fef05700.hdmi/rc/rc1/input5 [ 4.142966] input: vc4-hdmi-1 HDMI Jack as /devices/platform/soc/fef05700.hdmi/sound/card1/input6 [ 4.143797] vc4-drm gpu: bound fef05700.hdmi (ops vc4_hdmi_ops [vc4]) -- [ 5801.167942] WARNING: CPU: 3 PID: 753 at drivers/gpu/drm/vc4/vc4_hvs.c:1064 __vc4_hvs_stop_channel 0x15c/0x180 [vc4] [ 5801.168047] Modules linked in: xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat nf_tables nfnetlink br_netfilter bridge stp llc rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device overlay cmac algif_hash aes_arm64 aes_generic algif_skcipher af_alg bnep brcmfmac_wcc binfmt_misc hci_uart btbcm bluetooth brcmfmac brcmutil cfg80211 ecdh_generic ecc bcm2835_v4l2(C) rpi_hevc_dec rfkill libaes bcm2835_codec(C) bcm2835_isp(C) raspberrypi_hwmon bcm2835_mmal_vchiq(C) v4l2_mem2mem vc_sm_cma(C) videobuf2_vmalloc videobuf2_dma_contig i2c_brcmstb videobuf2_memops videobuf2_v4l2 videodev videobuf2_common snd_bcm2835(C) mc raspberrypi_gpiomem nvmem_rmem i2c_dev ledtrig_pattern fuse dm_mod ip_tables x_tables ipv6 vc4 v3d drm_shmem_helper snd_soc_hdmi_codec snd_soc_core gpu_sched snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd drm_display_helper drm_dma_helper cec drm_kms_helper drm drm_panel_orientation_quirks backlight [ 5801.168515] uio_pdrv_genirq uio -- [221181.531335] WARNING: CPU: 2 PID: 962 at drivers/gpu/drm/vc4/vc4_hdmi.c:726 vc4_hdmi_write_infoframe 0x3fc/0x470 [vc4] [221181.531402] Modules linked in: sg xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype nft_compat nf_tables nfnetlink br_netfilter bridge stp llc rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device overlay cmac algif_hash aes_arm64 aes_generic algif_skcipher af_alg bnep brcmfmac_wcc binfmt_misc hci_uart btbcm bluetooth brcmfmac brcmutil cfg80211 ecdh_generic ecc bcm2835_v4l2(C) rpi_hevc_dec rfkill libaes bcm2835_codec(C) bcm2835_isp(C) raspberrypi_hwmon bcm2835_mmal_vchiq(C) v4l2_mem2mem vc_sm_cma(C) videobuf2_vmalloc videobuf2_dma_contig i2c_brcmstb videobuf2_memops videobuf2_v4l2 videodev videobuf2_common snd_bcm2835(C) mc raspberrypi_gpiomem nvmem_rmem i2c_dev ledtrig_pattern fuse dm_mod ip_tables x_tables ipv6 vc4 v3d drm_shmem_helper snd_soc_hdmi_codec snd_soc_core gpu_sched snd_compress snd_pcm_dmaengine snd_pcm snd_timer snd drm_display_helper drm_dma_helper cec drm_kms_helper drm drm_panel_orientation_quirks [221181.531585] backlight uio_pdrv_genirq uio -- [221181.531800] write_device_infoframe 0xac/0x170 [drm_display_helper] [221181.531812] drm_atomic_helper_connector_hdmi_update_audio_infoframe 0x8c/0xb8 [drm_display_helper] [221181.531819] vc4_hdmi_audio_prepare 0x65c/0xf88 [vc4] [221181.531842] hdmi_codec_prepare 0xf8/0x160 [snd_soc_hdmi_codec] [221181.531848] snd_soc_pcm_dai_prepare 0x80/0x120 [snd_soc_core] [221181.531925] __soc_pcm_prepare 0x4c/0x120 [snd_soc_core] [221181.531959] soc_pcm_prepare 0x38/0x68 [snd_soc_core] [221181.531994] snd_pcm_do_prepare 0x38/0x60 [snd_pcm] [221181.532025] snd_pcm_action_single 0x50/0xb8 [snd_pcm] [221181.532044] snd_pcm_action_nonatomic 0xa8/0xb8 [snd_pcm] [221181.532062] snd_pcm_prepare 0x94/0xf8 [snd_pcm] [221181.532080] snd_pcm_common_ioctl 0xc94/0x17a0 [snd_pcm] [221181.532099] snd_pcm_ioctl 0x38/0x58 [snd_pcm] [221181.532116] __arm64_sys_ioctl 0xb4/0x100 !!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