Never mind, the problem occurs with the analogue sound card. What's next? I've attached another two sample error logs from syslog. System freeze after the error message reported above (you can find it after searching for error message).
** Attachment added: "syslog061320" https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1881432/+attachment/5384826/+files/syslog061320 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1881432 Title: System hangs after pulseaudio error: "snd_pcm_avail() returned a value that is exceptionally large: 125388 bytes (710 ms)" Status in pulseaudio package in Ubuntu: Confirmed Bug description: This is a bug on Ubuntu 20.04 (Focal Fossa) for pulseaudio version: 1:13.99.1-1ubuntu3.2. Description: At random intervals, pulseaudio gives the following error message: "snd_pcm_avail() returned a value that is exceptionally large: 125388 bytes (710 ms)," after which the system slows down to a crawl. It has occurred in two instances: while playing a video game, and while working in two different workspaces with a zoom client and Spotify open (though not actively playing any audio). The system is recoverable with the SysRq key. I have not been able to duplicate it on command, but it is recurrent. Possible duplicates: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1750947. The patch committed to fix this bug was reverted to fix a subsequent bug, https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1767784. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.2 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-04-01 (59 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) NonfreeKernelModules: wl Package: pulseaudio 1:13.99.1-1ubuntu3.2 PackageArchitecture: amd64 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 5.4.0-33.37-generic 5.4.34 Tags: focal Uname: Linux 5.4.0-33-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/14/2019 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P3.70 dmi.board.name: B450M-HDV R4.0 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP3.70:bd11/14/2019:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB450M-HDVR4.0:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1881432/+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
