Yes, this is because the alsa-lib has a new change but the pulseaudio
has not changed accordingly.
commit 93e03bdc2a3dcd5d12516f5de78e14d88a32ff2c
Author: Jaroslav Kysela <pe...@perex.cz>
Date: Wed Apr 4 09:58:12 2018 +0200
alsa.conf: change the location for add-on configs to /etc/alsa/conf.d
The add-on configuration files should be placed to a volatile place.
Signed-off-by: Jaroslav Kysela <pe...@perex.cz>
The steps to reproduce it:
install ubuntu 19.04 on a machine (any machines with audio capablilities)
after booting up, cd /tmp; arecord test.wav; aplay test.wav, then the aplay
will fail. And from then on, both aplay and arecord can't work anymore.
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https://bugs.launchpad.net/bugs/1824103
Title:
aplay record file failed always.
Status in linux package in Ubuntu:
Incomplete
Bug description:
Test machine: ThinkPad X1 Carbon
Image: Ubuntu Disco 19.04
CPU: Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz (family: 0x6, model: 0x8e,
stepping: 0xa)
GPU: Intel Corporation Device [8086:5917] (rev 07) (prog-if 00 [VGA
controller])
BIOS: N23ET55W (1.30 )
Steps:
1. Install image 19.04
2. Login as default user
3. Open a terminal and type "$ arecord abc.wav"
4. Say something and let laptop recorded your words
5. Cancel the record, please press 'Ctrl + C'
6. Please type "$ aplay abc.wav" in terminal
Expected result:
The voice played smoothly.
Actual result:
Step 3,
u@u-ThinkPad-X1-Carbon-6th:~$ arecord abc.wav
Recording WAVE 'abc.wav' : Unsigned 8 bit, Rate 8000 Hz, Mono
^CAborted by signal Interrupt...
arecord: pcm_read:2145: read error: Interrupted system call
Step 6,
u@u-ThinkPad-X1-Carbon-6th:~$ aplay abc.wav
ALSA lib pcm_dmix.c:1108:(snd_pcm_dmix_open) unable to open slave
aplay: main:828: audio open error: Device or resource busy
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