I've solved the problem with the help of the forum https://ubuntuforums.org/showthread.php?t=2486541
The issue is real, but can easily be solved so I put this bug report as invalid ** Changed in: alsa-driver (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/2018536 Title: Crash switching audio output while playing audio in Audacity Status in alsa-driver package in Ubuntu: Invalid Bug description: Following the steps below, i get a crash and KDE Plasma doesn't show any audio output device on my system. I have to reboot the PC to make it work again. I can reproduce 100% of the times in Kubuntu (installed and also using the Live ISO). I can't reproduce it on Ubuntu standard, so it seems to affect Kubuntu only I have a PC that is connected to the HDMI screen and to the earphones via audio jack. So I have 2 outputs: HDMI + Earphones. 1) Put the audio output to HDMI 2) Play an mp3 file for few seconds to check everything works 3) Open an audio file in Audacity 4) Play the audio file in Audacity 5) While playing, change the audio output to earphones. I attach the output of journalctl if it can be useful Operating System: Kubuntu 23.04 KDE Plasma Version: 5.27.4 KDE Frameworks Version: 5.104.0 Qt Version: 5.15.8 Kernel Version: 6.2.0-20-generic (64-bit) Graphics Platform: X11 Processors: 16 × 12th Gen Intel® Core™ i5-1240P Memory: 7.3 GiB of RAM Graphics Processor: Mesa Intel® Graphics Manufacturer: Intel(R) Client Systems Product Name: NUC12WSHi5 ProblemType: Bug DistroRelease: Ubuntu 23.04 Package: alsa-base 1.0.25+dfsg-0ubuntu7 ProcVersionSignature: Ubuntu 6.2.0-20.20-generic 6.2.6 Uname: Linux 6.2.0-20-generic x86_64 ApportVersion: 2.26.1-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: enrico 2214 F.... wireplumber /dev/snd/seq: enrico 2212 F.... pipewire CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Thu May 4 20:02:44 2023 InstallationDate: Installed on 2023-04-23 (11 days ago) InstallationMedia: Kubuntu 23.04 "Lunar Lobster" - Release amd64 (20230414.1) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/03/2022 dmi.bios.release: 5.26 dmi.bios.vendor: Intel Corp. dmi.bios.version: WSADL357.0086.2022.1103.1433 dmi.board.name: NUC12WSBi5 dmi.board.vendor: Intel Corporation dmi.board.version: M46425-303 dmi.chassis.type: 35 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 2.0 dmi.modalias: dmi:bvnIntelCorp.:bvrWSADL357.0086.2022.1103.1433:bd11/03/2022:br5.26:svnIntel(R)ClientSystems:pnNUC12WSHi5:pvrM46655-303:rvnIntelCorporation:rnNUC12WSBi5:rvrM46425-303:cvnIntelCorporation:ct35:cvr2.0:skuNUC12WSHi5000: dmi.product.family: WS dmi.product.name: NUC12WSHi5 dmi.product.sku: NUC12WSHi5000 dmi.product.version: M46655-303 dmi.sys.vendor: Intel(R) Client Systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/2018536/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp