Hi,
Speaker-webcam eMeet C980 Pro does not play, outputs only silent noise. The digital volume seems to be down.
dmesg:
[22406.805176] input: HD Webcam eMeet C980 Pro: HD We as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/usb1/1-7/1-7.1/1-7.1:1.0/input/input27 [22406.829048] usb 1-7.1: current rate 16000 is different from the runtime rate 48000 [22406.933044] usb 1-7.1: Warning! Unlikely big volume range (=10240), cval->res is probably wrong. [22406.933048] usb 1-7.1: [5] FU [PCM Playback Volume] ch = 1, val = -7168/3072/1 [22407.001043] usb 1-7.1: Warning! Unlikely big volume range (=3072), cval->res is probably wrong. [22407.001047] usb 1-7.1: [6] FU [Headset Capture Volume] ch = 1, val = -1536/1536/1
amixer contents: ..... numid=3,iface=MIXER,name='PCM Playback Switch' ; type=BOOLEAN,access=rw------,values=1 : values=on numid=4,iface=MIXER,name='PCM Playback Volume' ; type=INTEGER,access=rw---R--,values=1,min=0,max=10240,step=0 : values=10240 | dBminmax-min=-28.00dB,max=12.00dB numid=5,iface=MIXER,name='Headset Capture Switch' ; type=BOOLEAN,access=rw------,values=1 : values=on numid=6,iface=MIXER,name='Headset Capture Volume' ; type=INTEGER,access=rw---R--,values=1,min=0,max=3072,step=0 : values=3072 | dBminmax-min=-6.00dB,max=6.00dB .....
I tried playing with csetting numid=4 to various values, no effect.
Please what should be the correct min,max,res in volume_control_quirks for the 'PCM Playback Volume' control for such device?
Capture seems to be OK (maybe the range should be adjusted too for the complete range of control)
Also, the device does not seem to get the current rate correctly, but IIUC that should not have any adverse effect (not marked with QUIRK_FLAG_GET_SAMPLE_RATE yet):
[22407.178045] usb 1-7.1: current rate 16000 is different from the runtime rate 48000 [22407.199046] usb 1-7.1: current rate 16000 is different from the runtime rate 48000 [22407.220045] usb 1-7.1: current rate 16000 is different from the runtime rate 48000 [22407.282044] usb 1-7.1: current rate 16000 is different from the runtime rate 48000 [22811.235851] usb 1-7.1: current rate 16000 is different from the runtime rate 48000 [22829.335494] usb 1-7.1: current rate 16000 is different from the runtime rate 48000
cat /proc/asound/card2/stream0 SHENZHEN EMEET TECHNOLOGY CO., LTD. HD Webcam eMeet C980 Pro at usb-0000:02:00. : USB Audio
Playback: Status: Stop Interface 3 Altset 1 Format: S16_LE Channels: 1 Endpoint: 0x01 (1 OUT) (ADAPTIVE) Rates: 48000 Data packet interval: 1000 us Bits: 16 Channel map: FL
Capture: Status: Stop Interface 4 Altset 1 Format: S16_LE Channels: 1 Endpoint: 0x83 (3 IN) (SYNC) Rates: 16000 Data packet interval: 1000 us Bits: 16
alsa-info dump: http://alsa-project.org/db/?f=7af42635d88e858818932578aa8445810916a947
lsusb -v -d 328f:1912 attached.
Thank you very much for any hints.
Best regards,
Pavel.