No sound after 20.04 update with timidity installed

[Sebastian "Nait" Kacprzak]

After update from 18.04 to 20.04 sound stopped working.
KDE does not display Xonar sound card at all.

$ aplay /usr/share/sounds/alsa/Front_Center.wav
does not make any sound

Alsamixer displays Xonar set at full volume but changing anything there does not seem to have any effect.

Moving/deleting the pulse config ( ~/.config/pulse/ ) and restarting machine did not have any effect.

Running:
$ sudo alsa force-reload
fixes the issue (until restart sound is back, and is displayed properly in KDE)

(data arecord and cards display same data before and after restart)
$ arecord -l
**** Lista CAPTURE urządzeń ****
karta 0: DX [Xonar DX], urządzenie 0: Multichannel [Multichannel]
  Urządzenia podrzędne: 1/1
  Urządzenie podrzędne #0: subdevice #0
karta 0: DX [Xonar DX], urządzenie 1: Digital [Digital]
  Urządzenia podrzędne: 1/1
  Urządzenie podrzędne #0: subdevice #0

$ cat /proc/asound/cards
 0 [DX ]: AV200 - Xonar DX
                      Asus Virtuoso 100 at 0xd000, irq 31
 1 [HDMI ]: HDA-Intel - HDA ATI HDMI
                      HDA ATI HDMI at 0xfe960000 irq 67

$ lspci | grep -i audio
21:04.0 Multimedia audio controller: C-Media Electronics Inc CMI8788 [Oxygen HD Audio]
23:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]

(build in motherboard soundcard is disabled in BIOS)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: pulseaudio 1:13.99.1-1ubuntu3.2
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nait 5242 F.... pulseaudio
 /dev/snd/controlC1: nait 5242 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Sat May 16 14:54:07 2020
InstallationDate: Installed on 2018-11-11 (552 days ago)
InstallationMedia: Kubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to focal on 2020-05-01 (14 days ago)
dmi.bios.date: 09/27/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.J0
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B350 TOMAHAWK (MS-7A34)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.J0:bd09/27/2018:svnMicro-StarInternationalCo.,Ltd.:pnMS-7A34:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB350TOMAHAWK(MS-7A34):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7A34
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.

[Hui Wang (hui.wang)]

Is the package timidity installed on your machine? If yes, please remove it. "sudo apt -r timidity;reboot"

[Sebastian "Nait" Kacprzak (naicik)]

Thanks, removing timidity did help.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1793640, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.