Re: USB sound card issues

From: Muni Sekhar <munisekharrms@gmail.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: alsa-devel <alsa-devel@alsa-project.org>,
	linux-usb@vger.kernel.org, linux-sound@vger.kernel.org,
	kernelnewbies <kernelnewbies@kernelnewbies.org>
Subject: Re: USB sound card issues
Date: Tue, 8 Jun 2021 17:44:42 +0530	[thread overview]
Message-ID: <CAHhAz+gkm3EHE71PM4xzekC7Vsv3gksBd-M9_5iFe5AcNZbLOQ@mail.gmail.com> (raw)
In-Reply-To: <YL9RDBUsk23LvHV9@kroah.com>


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On Tue, Jun 8, 2021 at 4:44 PM Greg KH <gregkh@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?
[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.
>
> thanks,
>
> greg k-h

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