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On Tue, Jun 8, 2021 at 4:44 PM Greg KH <<a href="mailto:gregkh@linuxfoundation.org" rel="noreferrer noreferrer" target="_blank">gregkh@linuxfoundation.org</a>> wrote:<br>
><br>
> On Tue, Jun 08, 2021 at 04:20:07PM +0530, Muni Sekhar wrote:<br>
> > Hi all,<br>
> ><br>
> > I am using a USB sound card(snd-usb-audio), and it fails while doing<br>
> > the audio recording "arecord: pcm_read:2032: read error: Input/output<br>
> > error".<br>
> ><br>
> > What could be the problem? and is there a workaround for this?<br>
> ><br>
> > $ arecord -l<br>
> > **** List of CAPTURE Hardware Devices ****<br>
> > card 1: BT_AG [BT_002], device 0: USB Audio [USB Audio]<br>
> > Subdevices: 1/1<br>
> > Subdevice #0: subdevice #0<br>
> ><br>
> ><br>
> > $ arecord --device hw:1,0 --channels 1 --format S16_LE --rate 32000_Hz x.wav<br>
> > Recording WAVE 'x.wav' : Signed 16 bit Little Endian, Rate 32000 Hz, Mono<br>
> > arecord: pcm_read:2032: read error: Input/output error<br>
><br>
> What kernel version is this, and what other kernel messages are printed<br>
> when you plug your device in?<br>
[12932.016672] usb 2-1: USB disconnect, device number 5<br>
[12932.016683] usb 2-1.1: USB disconnect, device number 6<br>
[12962.085766] usb 2-1: new full-speed USB device number 7 using xhci_hcd<br>
[12962.275849] usb 2-1: New USB device found, idVendor=0a12, idProduct=4010<br>
[12962.275861] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0<br>
[12962.276538] usb 2-1: ep 0x81 - rounding interval to 1024 microframes, ep desc says 2040 microframes<br>
[12962.279699] hub 2-1:1.0: USB hub found<br>
[12962.280663] hub 2-1:1.0: 4 ports detected<br>
[12962.875024] usb 2-1.1: new full-speed USB device number 8 using xhci_hcd<br>
[12962.980977] usb 2-1.1: New USB device found, idVendor=0a12, idProduct=4007<br>
[12962.980991] usb 2-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=5<br>
[12962.981000] usb 2-1.1: Product: BT_002<br>
[12962.981008] usb 2-1.1: Manufacturer: Qualcomm<br>
[12962.981015] usb 2-1.1: SerialNumber: ABC4C25B<br>
[12962.992667] input: Qualcomm BT_002 as /devices/pci0000:00/0000:00:14.0/usb2/2-1/2-1.1/2-1.1:1.0/0003:0A12:4007.0003/input/input6<br>
[12963.048083] hid-generic 0003:0A12:4007.0003: input,hiddev0,hidraw0: USB HID v1.11 Device [Qualcomm BT_002] on usb-0000:00:14.0-1.1/input0<br>
[12963.066910] hid-generic 0003:0A12:4007.0004: hiddev0,hidraw1: USB HID v1.11 Device [Qualcomm BT_002] on usb-0000:00:14.0-1.1/input1<br>
<br>
Same error (arecord: pcm_read:2032: read error: Input/output error) observed on 4.4, 4.15 and 5.4 kernel version.<br>
><br>
> thanks,<br>
><br>
> greg k-h</div>