[Bug 2159581] [NEW] Audio regression: No internal speaker sound over sof-soundwire (headphone jack works) on Intel Panther Lake layout

Public bug reported: SoundWire subsystem detects internal endpoints cleanly as "Speakers - sof-soundwire". Userspace audio mixers fluctuate dynamically showing active playback, but the physical internal speaker amplifiers remain completely silent. The onboard headphone jack (HDA) works flawlessly. System is running Ubuntu 26.04 with kernel 7.0.0-generic. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-27-generic 7.0.0-27.27 ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6 Uname: Linux 7.0.0-27-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: fpm 4351 F.... wireplumber /dev/snd/seq: fpm 4331 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Jul 4 19:06:12 2026 InstallationDate: Installed on 2026-07-04 (0 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: Micro-Star International Co., Ltd. Prestige 16 AI+ C3MTG ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 xedrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic root=UUID=51afb7b2-3a6b-47e2-bef2-80c2eea73664 ro quiet splash xe.force_probe=b080 xe.enable_psr=0 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/25/2026 dmi.bios.release: 1.21 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: E2622IMS.115 dmi.board.asset.tag: Default string dmi.board.name: MS-2622 dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: REV:1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrE2622IMS.115:bd03/25/2026:br1.21:svnMicro-StarInternationalCo.,Ltd.:pnPrestige16AI+C3MTG:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-2622:rvrREV1.0:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrN/A:sku2622.1:pfaPrestige: dmi.product.family: Prestige dmi.product.name: Prestige 16 AI+ C3MTG dmi.product.sku: 2622.1 dmi.product.version: REV:1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute wayland-session -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2159581 Title: Audio regression: No internal speaker sound over sof-soundwire (headphone jack works) on Intel Panther Lake layout Status in linux package in Ubuntu: New Bug description: SoundWire subsystem detects internal endpoints cleanly as "Speakers - sof-soundwire". Userspace audio mixers fluctuate dynamically showing active playback, but the physical internal speaker amplifiers remain completely silent. The onboard headphone jack (HDA) works flawlessly. System is running Ubuntu 26.04 with kernel 7.0.0-generic. ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-27-generic 7.0.0-27.27 ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6 Uname: Linux 7.0.0-27-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: fpm 4351 F.... wireplumber /dev/snd/seq: fpm 4331 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Jul 4 19:06:12 2026 InstallationDate: Installed on 2026-07-04 (0 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) MachineType: Micro-Star International Co., Ltd. Prestige 16 AI+ C3MTG ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color XDG_RUNTIME_DIR=<set> ProcFB: 0 xedrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-27-generic root=UUID=51afb7b2-3a6b-47e2-bef2-80c2eea73664 ro quiet splash xe.force_probe=b080 xe.enable_psr=0 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/25/2026 dmi.bios.release: 1.21 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: E2622IMS.115 dmi.board.asset.tag: Default string dmi.board.name: MS-2622 dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: REV:1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrE2622IMS.115:bd03/25/2026:br1.21:svnMicro-StarInternationalCo.,Ltd.:pnPrestige16AI+C3MTG:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-2622:rvrREV1.0:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrN/A:sku2622.1:pfaPrestige: dmi.product.family: Prestige dmi.product.name: Prestige 16 AI+ C3MTG dmi.product.sku: 2622.1 dmi.product.version: REV:1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. 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