[pulseaudio-tickets] [Bug 107037] New: module-udev-detect fails to create sink for sound card

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107037

            Bug ID: 107037
           Summary: module-udev-detect fails to create sink for sound card
           Product: PulseAudio
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: modules
          Assignee: pulseaudio-bugs at lists.freedesktop.org
          Reporter: tukkek at gmail.com
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net

Created attachment 140339
  --> https://bugs.freedesktop.org/attachment.cgi?id=140339&action=edit
Debian testing packages installed/upgraded/removed immediately before sound was
lost

After updating Debian testing today my sound completely broke. I have managed
to fix the issue by enabling "module-alsa-sink" on "/etc/pulse/default.pa".
Even as "module-udev-detect" found the card, for some reason it didn't create a
sink for it, falling back to a null sink ("Dummy output") instead.

Before that, I tried using "module-detect" instead of "module-udev-detect" and
it did manage to find my cards and create a non-null sink but I still didn't
get any sound. I think in all likelihood it was just using the wrong card
because everything seemed to be working fine, except that I didn't get any
actual audio from the connected ports.

I'm using a HDA ATI SB card on a Realtek ALC887-VD chip on an old M5A78L-M
LX/BR ASUS motherboard and since activating "module-alsa-sink" everything is
working as intended. I'll updated this issue if anything else comes up.
Pùlseaudio version is 11.1.

This is my first time going into Pulseaudio to find a solution myself but since
I did manage to resolve the problem I think I got a decent grasp on what is
happening. I apologize if I'm making any wrong assumptions or writing nonsense.

What is crazy is that the Debian upgrade I made today was fairly small and
didn't touch any package that would obviously cause this issue. I will attach a
list of the packages that changed (most stuff is just me removing Wine). The
only things that I can imagine caused this issue were either
"gstreamer1.0-plugins-ugly" (unlikely) or" libstdc++6" (equally unlikely but
could explain an unexpected behavior change on udev-detect). Maybe I'm missing
something so feel free to take a look at the apt log.

Thanks for all the great work on Pulseaudio - other than this instance, it's
been many years since I had any trouble at all :)

(By the way, searching for "linux" "no sound" "dummy output" online shows a lot
of hits if you filter only results from the past month, many with the same
story of recent upgrade/install on a Debian-based distro. Probably same issue?)

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