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

[AMoonRabbit <razgriz.wilson6@gmail.com>]

On Tue, 27 Jul, 2021 at 1:02 pm, "Schmid, Carsten" 
<Carsten_Schmid@mentor.com> wrote:
> 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?
>> 

Responded to this already in the email on the 27th July.

>> 
>>  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.

So I have checked this, starting with the Walkman connected in DAC 
mode, so it is only seen in DAC mode. Pop OS updates the sound settings 
so that the Walkman is the selected output device. It does not show as 
muted. Within ALSA Mixer, I see that HDA Intel PCM is first, and then 
the WALKMAN device, however when selecting WALKMAN I get "This sound 
device does not have any controls".

> 
> Thanks,
> Carsten
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Kind regards,

Neil