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Installing [Service] SystemCallFilter=lsm_get_self_attr lsm_set_self_attr lsm_list_modules To /etc/systemd/user/pipewire-pulse.service.d/lsm-syscalls.conf and then run systemctl --user daemon-reload && systemctl --user restart pipewire- pulse --------------------- System: Ubuntu 26.04 (Resolute Raccoon - development branch) Kernel: 6.19.0-6-generic Laptop: Dell XPS 15 9510 Issue: Audio is not working. The system tray shows: “Not connected to PulseAudio server”. pipewire.service and wireplumber.service are running normally. However, pipewire-pulse.service crashes immediately with: Active: failed (Result: core-dump) signal=SYS Systemd shows: pipewire-pulse.service: Failed with result 'core-dump' Start request repeated too quickly. Because pipewire-pulse is not running, no audio devices are available. This appears to be a regression in Ubuntu 26.04 development branch. systemctl --user status pipewire → running systemctl --user status wireplumber → running systemctl --user status pipewire-pulse → core-dump (signal=SYS) 1) sunny@sunny-XPS-15-9510:~$ systemctl --user status pipewire ● pipewire.service - PipeWire Multimedia Service Loaded: loaded (/usr/lib/systemd/user/pipewire.service; enabled; preset: enabled) Active: active (running) since Mon 2026-02-23 09:25:00 IST; 31min ago Invocation: ed405918e4764f7cab8e8423ab0858c8 TriggeredBy: ● pipewire.socket Main PID: 4214 (pipewire) Tasks: 3 (limit: 34631) Memory: 7.6M (peak: 10.8M) CPU: 289ms CGroup: /user.slice/user-1000.slice/[email protected]/session.slice/pipewire.service └─4214 /usr/bin/pipewire Feb 23 09:25:00 sunny-XPS-15-9510 systemd[4182]: Started pipewire.service - PipeWire Multimedia Service. sunny@sunny-XPS-15-9510:~$ 2) sunny@sunny-XPS-15-9510:~$ systemctl --user status wireplumber ● wireplumber.service - Multimedia Service Session Manager Loaded: loaded (/usr/lib/systemd/user/wireplumber.service; enabled; preset: enabled) Active: active (running) since Mon 2026-02-23 09:25:00 IST; 31min ago Invocation: decaefb1bedf4e20a43ada3b30f1d9ce Main PID: 4228 (wireplumber) Tasks: 6 (limit: 34631) Memory: 29.8M (peak: 31M) CPU: 184ms CGroup: /user.slice/user-1000.slice/[email protected]/session.slice/wireplumber.service └─4228 /usr/bin/wireplumber Feb 23 09:25:00 sunny-XPS-15-9510 systemd[4182]: Started wireplumber.service - Multimedia Service Session Manager. Feb 23 09:25:01 sunny-XPS-15-9510 wireplumber[4228]: wp-device: SPA handle 'api.libcamera.enum.manager' could not be loaded; is it installed? Feb 23 09:25:01 sunny-XPS-15-9510 wireplumber[4228]: s-monitors-libcamera: PipeWire's libcamera SPA plugin is missing or broken. Some camera types may not be supported. sunny@sunny-XPS-15-9510:~$ 3) sunny@sunny-XPS-15-9510:~$ systemctl --user status pipewire-pulse × pipewire-pulse.service - PipeWire PulseAudio Loaded: loaded (/usr/lib/systemd/user/pipewire-pulse.service; enabled; preset: enabled) Active: failed (Result: core-dump) since Mon 2026-02-23 09:31:56 IST; 26min ago Duration: 1.126s Invocation: 0345c4c831d44691a02963d7cbef80bc TriggeredBy: × pipewire-pulse.socket Process: 27725 ExecStart=/usr/bin/pipewire-pulse (code=dumped, signal=SYS) Main PID: 27725 (code=dumped, signal=SYS) Mem peak: 2.5M CPU: 16ms Feb 23 09:31:56 sunny-XPS-15-9510 systemd[4182]: pipewire-pulse.service: Failed with result 'core-dump'. Feb 23 09:31:56 sunny-XPS-15-9510 systemd[4182]: pipewire-pulse.service: Scheduled restart job, restart counter is at 7. Feb 23 09:31:56 sunny-XPS-15-9510 systemd[4182]: pipewire-pulse.service: Start request repeated too quickly. Feb 23 09:31:56 sunny-XPS-15-9510 systemd[4182]: pipewire-pulse.service: Failed with result 'core-dump'. Feb 23 09:31:56 sunny-XPS-15-9510 systemd[4182]: Failed to start pipewire-pulse.service - PipeWire PulseAudio. sunny@sunny-XPS-15-9510:~$ ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: pipewire-pulse 1.5.84-1ubuntu2 ProcVersionSignature: Ubuntu 6.19.0-6.6-generic 6.19.2 Uname: Linux 6.19.0-6-generic x86_64 ApportVersion: 2.33.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sunny 4228 F.... wireplumber /dev/snd/seq: sunny 4214 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: XFCE Date: Mon Feb 23 10:01:29 2026 InstallationDate: Installed on 2021-12-06 (1540 days ago) InstallationMedia: Xubuntu 21.10 "Impish Indri" - Release amd64 (20211012) MachineType: Dell Inc. XPS 15 9510 PactlListSinks: Error: command ['pactl', 'list', 'sinks'] failed with exit code 1: Connection failure: Connection refused pa_context_connect() failed: Connection refused PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: pipewire UpgradeStatus: Upgraded to resolute on 2026-01-12 (42 days ago) dmi.bios.date: 12/02/2025 dmi.bios.release: 1.44 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.44.1 dmi.board.name: 01V4T3 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.44.1:bd12/02/2025:br1.44:svnDellInc.:pnXPS159510:pvr:rvnDellInc.:rn01V4T3:rvrA00:cvnDellInc.:ct10:cvr:sku0A61: dmi.product.family: XPS dmi.product.name: XPS 15 9510 dmi.product.sku: 0A61 dmi.sys.vendor: Dell Inc. ** Affects: apparmor (Ubuntu) Importance: Undecided Status: Confirmed ** Affects: pipewire (Ubuntu) Importance: Critical Status: Triaged ** Affects: systemd (Ubuntu) Importance: Critical Assignee: Nick Rosbrook (enr0n) Status: Fix Committed ** Tags: amd64 apport-bug resolute -- pipewire-pulse crashes when snap clients connect because libapparmor 5.0's new lsm_get_self_attr syscall is blocked by the service's seccomp filter https://bugs.launchpad.net/bugs/2142428 You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to the bug report. -- kubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
