QinHeng Electronics CH345 MIDI adapter triggers error

[Andras Muranyi]

Cheap oriental MIDI adapter starts up with the following error, but works as expected.*

E: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="1" name="usb-1a86_USB2.0-MIDI-00-USB20MIDI" card_name="alsa_card.usb-1a86_USB2.0-MIDI-00-USB20MIDI" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed.

The device:
1a86:752d QinHeng Electronics CH345 MIDI adapter

Of course i'm not sure whether this is a PA problem or an ALSA or UDEV bug.

Ubuntu 14.04.2 LTS
Pulseaudio 1:4.0-0ubuntu11.1

* works almost as expected: there is one physical input and one output, but in ALSA one input and two outputs appear.

[Raymond (superquad-vortex2)]

post the output of alsa-info.sh

https://wiki.ubuntu.com/PulseAudio/Log

[Raymond (superquad-vortex2)]

are there any error message in pulseaudio verbose log ?

module-udev-detect should skip any card without pcm devices

youe have to file an upstream bug report

https://bugs.freedesktop.org/enter_bug.cgi?product=PulseAudio

[Raymond (superquad-vortex2)]

!!ALSA Device nodes
!!-----------------

crw-rw----+ 1 root audio 116, 6 May 27 13:00 /dev/snd/controlC0
crw-rw----+ 1 root audio 116, 3 May 27 13:00 /dev/snd/controlC1
crw-rw----+ 1 root audio 116, 25 May 27 13:00 /dev/snd/controlC2
crw-rw----+ 1 root audio 116, 17 May 27 13:00 /dev/snd/controlC3
crw-rw----+ 1 root audio 116, 8 May 27 13:00 /dev/snd/hwC3D0
crw-rw----+ 1 root audio 116, 18 May 27 13:00 /dev/snd/hwC3D2
crw-rw----+ 1 root audio 116, 7 May 27 13:00 /dev/snd/midiC0D0
crw-rw----+ 1 root audio 116, 2 May 27 13:00 /dev/snd/midiC1D0
crw-rw----+ 1 root audio 116, 10 May 27 13:00 /dev/snd/midiC3D0
crw-rw----+ 1 root audio 116, 9 May 27 13:00 /dev/snd/midiC3D1
crw-rw----+ 1 root audio 116, 19 May 27 13:00 /dev/snd/midiC3D2
crw-rw----+ 1 root audio 116, 20 May 27 13:00 /dev/snd/midiC3D3
crw-rw----+ 1 root audio 116, 5 May 27 13:01 /dev/snd/pcmC0D0c
crw-rw----+ 1 root audio 116, 4 May 27 13:01 /dev/snd/pcmC0D0p
crw-rw----+ 1 root audio 116, 24 May 27 13:01 /dev/snd/pcmC2D0c
crw-rw----+ 1 root audio 116, 23 May 27 13:01 /dev/snd/pcmC2D0p
crw-rw----+ 1 root audio 116, 22 May 27 13:00 /dev/snd/pcmC2D1c
crw-rw----+ 1 root audio 116, 21 May 27 13:01 /dev/snd/pcmC2D2p
crw-rw----+ 1 root audio 116, 16 May 27 13:01 /dev/snd/pcmC3D0c
crw-rw----+ 1 root audio 116, 15 May 27 13:01 /dev/snd/pcmC3D0p
crw-rw----+ 1 root audio 116, 14 May 27 13:00 /dev/snd/pcmC3D1c
crw-rw----+ 1 root audio 116, 13 May 27 13:00 /dev/snd/pcmC3D2c
crw-rw----+ 1 root audio 116, 12 May 27 13:00 /dev/snd/pcmC3D2p
crw-rw----+ 1 root audio 116, 11 May 27 13:00 /dev/snd/pcmC3D3p
crw-rw----+ 1 root audio 116, 1 May 27 13:00 /dev/snd/seq
crw-rw----+ 1 root audio 116, 33 May 27 13:00 /dev/snd/timer

[Andras Muranyi (muranyia)]

Created attachment 116075
Output of alsa-info.sh

Cheap oriental MIDI adapter starts up with the following error, but works as expected.*

E: [pulseaudio] module.c: Failed to load module "module-alsa-card" (argument: "device_id="1" name="usb-1a86_USB2.0-MIDI-00-USB20MIDI" card_name="alsa_card.usb-1a86_USB2.0-MIDI-00-USB20MIDI" namereg_fail=false tsched=yes fixed_latency_range=no ignore_dB=no deferred_volume=yes use_ucm=yes card_properties="module-udev-detect.discovered=1""): initialization failed.

The device:
1a86:752d QinHeng Electronics CH345 MIDI adapter

Ubuntu 14.04.2 LTS
Pulseaudio 1:4.0-0ubuntu11.1

* works almost as expected: there is one physical input and one output, but in ALSA one input and two outputs appear.

[Andras Muranyi (muranyia)]

Created attachment 116077
Output of pulseaudio -vvvv

[Raymond (superquad-vortex2)]

 module-udev-detect should skip card 1 when there is no pcm devices

crw-rw----+ 1 root audio 116, 3 May 27 13:00 /dev/snd/controlC1
crw-rw----+ 1 root audio 116, 2 May 27 13:00 /dev/snd/midiC1D0

[Tanu Kaskinen (tanuk)]

Updated the bug title.

The error is harmless, as you found out.

[Andras Muranyi (muranyia)]

In Xenial, the error message is still there, however the behavior has improved and only 1 MIDI out and 1 MIDI in ports are registered.

[Gitlab-migration (gitlab-migration)]

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/issues/200.