USB sound card issues

[Muni Sekhar]

On Tue, Jun 8, 2021 at 6:02 PM Greg KH <gregkh at linuxfoundation.org> wrote:
>
> On Tue, Jun 08, 2021 at 05:44:42PM +0530, Muni Sekhar wrote:
> > On Tue, Jun 8, 2021 at 4:44 PM Greg KH <gregkh at linuxfoundation.org> wrote:
> > >
> > > On Tue, Jun 08, 2021 at 04:20:07PM +0530, Muni Sekhar wrote:
> > > > Hi all,
> > > >
> > > > I am using a USB sound card(snd-usb-audio), and it fails while doing
> > > > the audio recording "arecord: pcm_read:2032: read error: Input/output
> > > > error".
> > > >
> > > > What could be the problem? and is there a workaround for this?
> > > >
> > > > $ arecord -l
> > > > **** List of CAPTURE Hardware Devices ****
> > > > card 1: BT_AG [BT_002], device 0: USB Audio [USB Audio]
> > > >   Subdevices: 1/1
> > > >   Subdevice #0: subdevice #0
> > > >
> > > >
> > > > $ arecord --device hw:1,0 --channels 1 --format S16_LE --rate 32000_Hz
> > x.wav
> > > > Recording WAVE 'x.wav' : Signed 16 bit Little Endian, Rate 32000 Hz,
> > Mono
> > > > arecord: pcm_read:2032: read error: Input/output error
> > >
> > > What kernel version is this, and what other kernel messages are printed
> > > when you plug your device in?
>
>
> What kernel version is this?
4.15.0-54-generic

>
> > [12932.016672] usb 2-1: USB disconnect, device number 5
> > [12932.016683] usb 2-1.1: USB disconnect, device number 6
> > [12962.085766] usb 2-1: new full-speed USB device number 7 using xhci_hcd
> > [12962.275849] usb 2-1: New USB device found, idVendor=0a12, idProduct=4010
> > [12962.275861] usb 2-1: New USB device strings: Mfr=0, Product=0,
> > SerialNumber=0
> > [12962.276538] usb 2-1: ep 0x81 - rounding interval to 1024 microframes, ep
> > desc says 2040 microframes
> > [12962.279699] hub 2-1:1.0: USB hub found
> > [12962.280663] hub 2-1:1.0: 4 ports detected
> > [12962.875024] usb 2-1.1: new full-speed USB device number 8 using xhci_hcd
> > [12962.980977] usb 2-1.1: New USB device found, idVendor=0a12,
> > idProduct=4007
> > [12962.980991] usb 2-1.1: New USB device strings: Mfr=1, Product=2,
> > SerialNumber=5
> > [12962.981000] usb 2-1.1: Product: BT_002
> > [12962.981008] usb 2-1.1: Manufacturer: Qualcomm
> > [12962.981015] usb 2-1.1: SerialNumber: ABC4C25B
> > [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
> > [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
> > [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
> >
> > Same error (arecord: pcm_read:2032: read error: Input/output error)
> > observed on 4.4, 4.15 and 5.4 kernel version.
>
> What exact versions of these are you using?
4.4.0-66-generic
4.15.0-54-generic
Ubuntu 20.04

>
> And what about the latest 5.12.y release?
I don't have this test setup.



>
> thanks,
>
> greg k-h



-- 
Thanks,
Sekhar