Public bug reported: On a Dell Precision 5690 (Ubuntu-certified hardware; Core Ultra 7 165H Meteor Lake, board 088TDK, BIOS 1.23.0, Ubuntu 24.04 + HWE kernel 6.14.0-37-generic), the internal microphone (sof-soundwire card, topology sof-mtl-rt713-l0-rt1316-l12-rt1713-l3, Realtek SoundWire codecs 025d:0713 / 2x 025d:1316 / 025d:1713) intermittently produces pure full- scale click/impulse-train garbage instead of audio.
Key findings from systematic testing (full details and quantified data in the upstream reports below): * The failed state is sticky at the hardware level: it survives stream reopen, suspend/resume, WARM REBOOT, and a full unload/reload of the entire SOF + SoundWire + codec kernel module chain. Only a cold power-off clears it. * A working microphone can flip into the failed state at runtime when the audio topology reconfigures (reproduced by unplugging a USB audio device). * Reproduced on SOF firmware 2.13.0.1 and 2.14.1.1 — both affected. Mic-mute hotkey state has no effect. Both S16_LE and S32_LE affected; corruption visible in direct ALSA hw capture (below PipeWire). * Windows on the same machine always records correctly, so the hardware is healthy — correct handling of this board is achievable in software. * Because kernel updates always warm-reboot, the bad state rides across updates — producing the widely-reported (and misleading) "mic works or breaks depending on kernel version" pattern on these machines. Upstream reports: * https://github.com/thesofproject/sof/issues/10988 (my full report, active) * https://github.com/thesofproject/sof/issues/9852 (earlier report on the same model, closed as "OEM-related" — the SOF team notes they lack access to Dell board integration details) Since this machine is Ubuntu-certified and the SOF project has pointed at OEM/board integration, this seems squarely in scope for Canonical's OEM/hardware-enablement work with Dell. Happy to run diagnostics, test kernels/patches, and capture the failed state on request (I can enter it semi-on-demand and clear it deterministically). alsa-info (working state, post cold boot): https://gist.github.com/NinjaTuna007/03fdf828bb2e8487644295d6a8fa2c4e ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.14.0-37-generic 6.14.0-37.37~24.04.1 ProcVersionSignature: Ubuntu 6.14.0-37.37~24.04.1-generic 6.14.11 Uname: Linux 6.14.0-37-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Fri Jul 10 22:58:36 2026 InstallationDate: Installed on 2024-10-22 (626 days ago) InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240425.1) MachineType: Dell Inc. Precision 5690 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.14.0-37-generic root=UUID=f06237b6-ac5a-48e0-a5ae-74a6c81d5872 ro quiet splash nvidia.NVreg_PreserveVideoMemoryAllocations=1 vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-6.14.0-37-generic N/A linux-backports-modules-6.14.0-37-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.27 SourcePackage: linux-hwe-6.14 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/23/2026 dmi.bios.release: 1.23 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.23.0 dmi.board.name: 088TDK dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.ec.firmware.release: 1.24 dmi.modalias: dmi:bvnDellInc.:bvr1.23.0:bd04/23/2026:br1.23:efr1.24:svnDellInc.:pnPrecision5690:pvr:rvnDellInc.:rn088TDK:rvrA00:cvnDellInc.:ct10:cvr:sku0CC8: dmi.product.family: Precision dmi.product.name: Precision 5690 dmi.product.sku: 0CC8 dmi.sys.vendor: Dell Inc. ** Affects: linux-hwe-6.14 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2160386 Title: Dell Precision 5690 (Ubuntu-certified, MTL): internal DMIC capture corrupts to full-scale impulse train; state survives warm reboot, cleared only by cold power-off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.14/+bug/2160386/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
