Hi all, We are having issues with a special multiple interface audio device. The card has 3 devices with the same VID/PID, 2 of them is a mono output device and the third one has an input and an output channel also. This third device does not function properly with newer kernel versions, the audio capture is not working. Tests: -our Debian Jessie based distro with kernel 3.16 -> OK -our Debian Jessie based distro with kernel 4.1.25 -> OK -our Debian Jessie based distro with kernel 4.4.1 -> NOK -our Debian Jessie based distro with kernel 4.6 -> NOK -our Debian Jessie based distro with kernel 4.7 -> NOK -Debian testing daily snapshot with kernel 4.6.0 -> NOK In the NOK cases, when we try to capture the stream with arecord, we get: "audio open error: No such file or directory". We can also see that in the NOK cases the arecord labels the capture device with device number 0, but in the OK cases it labels it with device number 2. Aplay labels these devices with device number 2 in any case. Arecord list output in the good case: card 5: Module [Spc Module], device 2: USB Audio [USB Audio #2] Subdevices: 1/1 Subdevice #0: subdevice #0 and in the bad case: card 5: Module [Spc Module], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 Relevant parts of alsa-info.sh output attached. What could be the root of the problem? What areas in the alsa codebase could be involved? Should we report an ALSA bug? Best regards, Gergely Pecsi
!!Linux Distribution !!------------------ intercepted, monitored, recorded, copied, audited, inspected, and PRETTY_NAME="Debian GNU/Linux 8 (jessie)" NAME="Debian GNU/Linux" ID=debian HOME_URL="http://www.debian.org/"; SUPPORT_URL="http://www.debian.org/support"; BUG_REPORT_URL="https://bugs.debian.org/"; image=K7-debian_jessie_686-pae_2016-05-20_-_20-01.img !!DMI Information !!--------------- Manufacturer: To be filled by O.E.M. Product Name: To be filled by O.E.M. Product Version: To be filled by O.E.M. Firmware Version: QA32R116 !!Kernel Information !!------------------ Kernel release: 4.4.1 Operating System: GNU/Linux Architecture: i686 Processor: unknown SMP Enabled: Yes !!ALSA Version !!------------ Driver version: k4.4.1 Library version: 1.1.0 Utilities version: 1.0.28 !!Loaded ALSA modules !!------------------- ... snd_usb_audio !!Sound Servers on this system !!---------------------------- No sound servers found. !!Soundcards recognised by ALSA !!----------------------------- ... 5 [Module ]: USB-Audio - Spc Module Spc Module at usb-0000:00:1d.0-1.3.1, full speed !!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 !!Loaded sound module options !!--------------------------- ... !!Module: snd_usb_audio autoclock : Y device_setup : 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 enable : Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y,Y id : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null) ignore_ctl_error : N index : -2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 pid : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 vid : -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1 !!USB Mixer information !!--------------------- --startcollapse-- ... USB Mixer: usb_id=0x1fb5000e, ctrlif=0, ctlerr=0 Card: Spc Module at usb-0000:00:1d.0-1.3.1, full speed USB Mixer: usb_id=0x1fb5000e, ctrlif=0, ctlerr=0 Card: Spc Module at usb-0000:00:1d.0-1.3.1, full speed USB Mixer: usb_id=0x1fb5000e, ctrlif=0, ctlerr=0 Card: pk Module at usb-0000:00:1d.0-1.3.1, full speed --endcollapse-- !!ALSA Device nodes !!----------------- ... crw-rw-rw- 1 root audio 116, 17 Jun 7 09:45 /dev/snd/controlC5 ... crw-rw-rw- 1 root audio 116, 18 Jun 7 09:45 /dev/snd/pcmC5D0p crw-rw-rw- 1 root audio 116, 19 Jun 7 09:45 /dev/snd/pcmC5D1p crw-rw-rw- 1 root audio 116, 20 Jun 7 09:45 /dev/snd/pcmC5D2p crw-rw---- 1 root audio 116, 1 Jun 7 09:45 /dev/snd/seq crw-rw---- 1 root audio 116, 33 Jun 7 09:45 /dev/snd/timer /dev/snd/by-id: total 0 drwxr-xr-x 2 root root 160 Jun 7 09:45 . drwxr-xr-x 4 root root 500 Jun 7 09:45 .. ... lrwxrwxrwx 1 root root 12 Jun 7 09:45 usb-Spk_Module_3003267297-00 -> ../controlC5 /dev/snd/by-path: total 0 drwxr-xr-x 2 root root 160 Jun 7 09:45 . drwxr-xr-x 4 root root 500 Jun 7 09:45 .. ... lrwxrwxrwx 1 root root 12 Jun 7 09:45 pci-0000:00:1d.0-usb-0:1.3.1:1.0 -> ../controlC5 !!Aplay/Arecord output !!-------------------- APLAY **** List of PLAYBACK Hardware Devices **** ... card 5: Module [Spc Module], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 card 5: Module [Spc Module], device 1: USB Audio [USB Audio #1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 5: Module [Spc Module], device 2: USB Audio [USB Audio #2] Subdevices: 1/1 Subdevice #0: subdevice #0 ARECORD **** List of CAPTURE Hardware Devices **** ... card 5: Module [Spc Module], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 !!Amixer output !!------------- ... !!-------Mixer controls for card 5 [Module] Card hw:5 'Module'/'Spc Module at usb-0000:00:1d.0-1.3.1, full speed' Mixer name : 'USB Mixer' Components : 'USB1fb5:000e' Controls : 4 Simple ctrls : 0 !!Alsactl output !!-------------- --startcollapse-- ... state.Module { control.1 { iface PCM name 'Playback Channel Map' value 0 comment { access read type INTEGER count 1 range '0 - 36' } } control.2 { iface PCM device 1 name 'Playback Channel Map' value 0 comment { access read type INTEGER count 1 range '0 - 36' } } control.3 { iface PCM device 2 name 'Playback Channel Map' value 0 comment { access read type INTEGER count 1 range '0 - 36' } } control.4 { iface PCM name 'Capture Channel Map' value 0 comment { access read type INTEGER count 1 range '0 - 36' } } } --endcollapse-- !!All Loaded Modules !!------------------ Module uas usb_storage des_generic ecb md4 hmac nls_utf8 bonding joydev iTCO_wdt iTCO_vendor_support ppdev binfmt_misc xt_comment nf_log_ipv4 nf_log_common xt_LOG xt_limit xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_multiport xt_conntrack nf_conntrack iptable_filter ip_tables ip6table_filter ip6_tables x_tables cp210x_gpio snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_hwdep snd_seq_device cifs dns_resolver fscache intel_rapl intel_powerclamp coretemp kvm_intel kvm snd_pcm irqbypass snd_timer snd crc32_pclmul soundcore aesni_intel aes_i586 xts lrw gf128mul ablk_helper lpc_ich cryptd pcspkr mfd_core i2c_i801 parport_pc iosf_mbi battery tpm_tis shpchp parport snd_soc_sst_acpi tpm 8250_fintek evdev ac processor usbserial autofs4 ext4 crc16 mbcache jbd2 sg sd_mod hid_generic usbhid hid crc32c_intel ahci ehci_pci ehci_hcd libahci i915 igb ptp usbcore drm_kms_helper libata pps_core usb_common i2c_algo_bit drm scsi_mod fan thermal video button !!ALSA/HDA dmesg !!-------------- [ 7.672852] usb 1-1.2.3: [82] FU [Mic Capture Volume] ch = 1, val = -32768/32767/1 [ 7.673389] usbcore: registered new interface driver snd-usb-audio [ 7.767495] ip6_tables: (C) 2000-2006 Netfilter Core Team
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