USB-Audio regression on behringer UMC404HD

[Michael Ralston]

Working, 6.0.16-lqx1
https://hastebin.com/omoqasiqek.apache

Not working, 6.1.1-arch1-1.1
https://hastebin.com/itasefinaz.apache

I built the working kernel myself with patched sources. Let me know if
you'd like me to run a test with any particular kernel build or
version.

--
Michael

On Tue, 3 Jan 2023 at 20:33, Takashi Iwai <tiwai at suse.de> wrote:
>
> On Tue, 03 Jan 2023 10:07:42 +0100,
> Thorsten Leemhuis wrote:
> >
> > [TLDR: I'm adding this report to the list of tracked Linux kernel
> > regressions; all text you find below is based on a few templates
> > paragraphs you might have encountered already already in similar form.
> > See link in footer if these mails annoy you.]
> >
> > [CCing alsa maintainers]
> >
> > On 02.01.23 18:29, Michael Ralston wrote:
> > > I'm currently experiencing a regression with the audio on my Behringer
> > > U-Phoria UMC404HD.
> > >
> > > Alsa info is at:
> > > http://alsa-project.org/db/?f=f453b8cd0248fb5fdfa38e1b770e774102f66135
> > >
> > > I get no audio in or out for this device with kernel versions 6.1.1 and 6.1.2.
> > >
> > > The versions I have tried that work correctly include 5.15.86 LTS,
> > > 5.19.12, and 6.0.13–16.
> > >
> > > When I run this on 6.1.1, it will just hang until I ctrl+c:
> > > aplay -D plughw:1,0 /usr/share/sounds/alsa/Front_Center.wav
> > >
> > > I've run strace on that command, and its output is at:
> > > https://pastebin.com/WaxJpTMe
> > >
> > > Nothing out of the ordinary occurs when aplay is run, according to the
> > > kernel logs.
> > >
> > > Please let me know how I can provide additional debugging information
> > > if necessary.
>
> Please boot with snd_usb_audio.dyndbg=+p option, and get the kernel
> logs in both working and non-working cases.
>
> I guess it's a regression due to the hw_params/prepare split, but need
> to check more details.
>
>
> thanks,
>
> Takashi