RE: Fwd: Linux Kernel 5.12.10 Walkman USB DAC support issues

["Schmid, Carsten" <Carsten_Schmid@mentor.com>]

Hi Neil,

> -----Original Message-----
> From: AMoonRabbit <razgriz.wilson6@gmail.com>

No top posts please.

On Tue, 27 Jul, 2021 at 7:43 am, "Schmid, Carsten"
<Carsten_Schmid@mentor.com> wrote:
> Hi Greg,
>
> On Tue, Jul 27, 2021 at 12:37:28AM +0100, Razgriz375 (Neil) wrote:
>
>>>  [  109.668465] usb 1-1: USB disconnect, device number 2
>>>  [  110.084429] usb 1-1: new high-speed USB device number 5 using
>>> xhci_hcd
>>>  [  110.237963] usb 1-1: New USB device found, idVendor=054c,
>>> idProduct=0b8c, bcdDevice= 1.00
>>>  [  110.237989] usb 1-1: New USB device strings: Mfr=2, Product=3,
>>> SerialNumber=4
>>>  [  110.238002] usb 1-1: Product: WALKMAN
>>>  [  110.238011] usb 1-1: Manufacturer: Sony
>>>  [  110.238019] usb 1-1: SerialNumber: 10458B55477916
>>>  [  110.342104] usb 1-1: 1:7 : unsupported format bits 0x100000000
>>>  [  110.343953] usbcore: registered new interface driver
>>> snd-usb-audio
>>>
>>
>>
>>  Looks like you removed the device and then added it back?  And it
>> says
>>  the device is supported by the kernel now, what does not work
>> properly?
>
> But earlier in boot these messages are seen:
> [    1.908489] usb 1-1: New USB device found, idVendor=054c,
> idProduct=0ca1, bcdDevice= 1.00
> [    1.908503] usb 1-1: New USB device strings: Mfr=2, Product=3,
> SerialNumber=4
> [    1.908508] usb 1-1: Product: WALKMAN
> [    1.908513] usb 1-1: Manufacturer: Sony
> [    1.908516] usb 1-1: SerialNumber: 10458B55477916
> [    2.195821] usb-storage 1-1:1.0: USB Mass Storage device detected
> [    2.195988] scsi host0: usb-storage 1-1:1.0
>
> ProductId is different, that's strange.
>
> Neil, could you collect the dmesg from the working kernel 5.10 please?
> And: is the device expected to be a mass storage (aka USB disk) and
> sound card in one?
>

> So this is the Dmesg output from 5.10.17 with working output to USB DAC
> (Walkman visually gets audio as the amp meter visualiser works where as
> on newer kernels, whilst the system looks to be outputting sound, the
> Walkman shows it's receiving nothing).
...
> [   12.202312]usb 1-1: new high-speed USB device number 3 using xhci_hcd
> [   12.351838]usb 1-1: New USB device found, idVendor=054c,
> idProduct=0b8c, bcdDevice= 1.00
> [   12.351844]usb 1-1: New USB device strings: Mfr=2, Product=3,
> SerialNumber=4
> [   12.351847]usb 1-1: Product: WALKMAN
> [   12.351850]usb 1-1: Manufacturer: Sony
> [   12.351852]usb 1-1: SerialNumber: 10458B55477916
> [   38.560172]usb 1-1: 1:7 : unsupported format bits 0x100000000
> [   38.562750]usbcore: registered new interface driver snd-usb-audio
> [   38.630995]snd_hda_intel 0000:00:1f.3: DSP detected with PCI
> class/subclass/prog-if info 0x040380

Looks like on the old kernel the Walkman is seen as the first sound card.
On the new kernel, it was seen as a mass storage first and later switched to snd-usb.
Please check if your Walkman appears as a sound card in the new kernel
and if it is muted due to not being the default output.

Thanks,
Carsten
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