I can see a few issues in the log from your VM:
1. Buggy audio in the VM's kernel driver (says pulseaudio):
jul 05 11:05:21 VM-Xubuntu-2004 pulseaudio[1406]: ALSA woke us up to write new
data to the device, but there was actually nothing to write.
jul 05 11:05:21 VM-Xubuntu-2004 pulseaudio[1406]: Most likely this is a bug in
the ALSA driver 'snd_hda_intel'. Please report this issue to the ALSA
developers.
jul 05 11:05:21 VM-Xubuntu-2004 pulseaudio[1406]: We were woken up with POLLOUT
set -- however a subsequent snd_pcm_avail() returned 0 or another value <
min_avail.
jul 05 11:05:21 VM-Xubuntu-2004 pulseaudio[1406]: Disabling timer-based
scheduling because running inside a VM.
2. More problems with the VM's kernel driver:
jul 05 11:05:28 VM-Xubuntu-2004 pulseaudio[1406]: Unable to set sw params:
Permission denied
jul 05 11:05:28 VM-Xubuntu-2004 pulseaudio[1406]: Failed to set software
parameters: Permission denied
jul 05 11:05:28 VM-Xubuntu-2004 pulseaudio[1406]: Error opening PCM device
front:0: No such file or directory
jul 05 11:05:28 VM-Xubuntu-2004 systemd[1399]: pulseaudio.service: Succeeded.
3. A couple of kernel crashes apparently relating to running out of
memory in the VM.
So I suggest:
* Giving the VM more memory.
* Running fewer apps in the VM.
* Configuring the VM with a different type of virtual audio device (if you
can).
** Package changed: pulseaudio (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/1886330
Title:
pulseaudio not working in Virtualbox
Status in linux package in Ubuntu:
New
Bug description:
I run my "work" VMs and in Xubuntu pulse audio often does not start.
In this dump I tried to start music through Firefox and through my
media player quodlibet and none of the audio starts.
See attachment with the pulseaudio volume control and quodlibet stuck
on time 0:00 like Firefox.
I do not have the problem with plain Ubuntu, Ubuntu Mate nor with
Ubuntu Studio.
The problem is annoying, because I use Xubuntu for office and
communication like Email and the WhatsApp/Firefox/ICE combination and
with this bug WhatsApp is useless.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.3
ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44
Uname: Linux 5.4.0-40-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: bertadmin 1490 F.... pulseaudio
/dev/snd/pcmC0D0c: bertadmin 1490 F...m pulseaudio
/dev/snd/pcmC0D0p: bertadmin 1490 F...m pulseaudio
/dev/snd/timer: bertadmin 1490 f.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Sun Jul 5 11:33:48 2020
InstallationDate: Installed on 2018-03-11 (847 days ago)
InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180310)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to focal on 2020-03-04 (122 days ago)
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.board.name: VirtualBox
dmi.board.vendor: Oracle Corporation
dmi.board.version: 1.2
dmi.chassis.type: 1
dmi.chassis.vendor: Oracle Corporation
dmi.modalias:
dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
dmi.product.family: Virtual Machine
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH
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