[pulseaudio-tickets] [Bug 106557] New: power on / plugging in E-MU 0202 USB hangs up pulseaudio and USB bus

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106557

            Bug ID: 106557
           Summary: power on / plugging in E-MU 0202 USB hangs up
                    pulseaudio and USB bus
           Product: PulseAudio
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: core
          Assignee: pulseaudio-bugs at lists.freedesktop.org
          Reporter: f3flight at gmail.com
        QA Contact: pulseaudio-bugs at lists.freedesktop.org
                CC: lennart at poettering.net

I've originally reported the issue here -
https://bbs.archlinux.org/viewtopic.php?pid=1780719#p1780719

In short, I have E-MU 0202 USB and as soon as I plug it in, I am no loger able
to view the list of audio devices, I start seeing errors in dmesg:
[Wed Apr 18 13:33:49 2018] usb 3-2: 2:1: usb_set_interface failed (-110)

And if I make a few more requests to audio subsystem my USB mouse and keyboard
stop working (builtin kb and touchpad still work).

The workaround is to stop all instances of pulseaudio, namely user's daemon and
GDM's daemon (I only found one way - "for i in {0..50}; do sudo killall
pulseaduio" - otherwise GDM will restart, also changing config param
autostart=no does not take effect and service still gets restarted), then plug
the interface, then logout/login to recover pulseaudio. Side effect of this is
that audio volume level in Gnome does not affect volume of the card, for
whatever reason.

So - a few different issues here, but main is hangup of pulseaudio when card is
plugged in.

Interesting is that there is no such issue in Ubuntu, only in my Arch Linux
installation. However, I tried building and booting with Ubuntu's kernel
configuration on my Arch system and the issue persisted, so it looks to be
related to the version of pulseaudio and/or dependent libs and not to kernel. I
tried older kernels as well with same result.

I can provide more details or execute any tests, let me know what's needed.

PulseAudio is 11.1-1, pulseaudio-alsa is 2-3, distro - Arch Linux x64.

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