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

Hi Neil,

-----Original Message-----
From: AMoonRabbit <redacted>

No top posts please.

On Tue, 27 Jul, 2021 at 7:43 am, "Schmid, Carsten"
[off-list ref] wrote:

Hi Greg,

On Tue, Jul 27, 2021 at 12:37:28AM +0100, Razgriz375 (Neil) wrote:

quoted

quoted

 [  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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