[Bug 2171307] Re: No audio output (Dummy Output only) on HP OmniBook X Flip 14-kb0xxx, Panther Lake, kernel 7.3.0-9 (Ubuntu 26.10)

Hi, Thanks for filing a bug report. As this is an upstream issue we'll wait to see what upstream does first and then mirror their change in Ubuntu. I've linked the upstream bug to this issue, if anything changes post a comment here and I'll be notified. ** Also affects: linux via https://github.com/thesofproject/linux/issues/5981 Importance: Unknown Status: Unknown ** Changed in: linux (Ubuntu) Assignee: (unassigned) => Ross Porter (rossporter506) -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2171307 Title: No audio output (Dummy Output only) on HP OmniBook X Flip 14-kb0xxx, Panther Lake, kernel 7.3.0-9 (Ubuntu 26.10) Status in Linux: Unknown Status in linux package in Ubuntu: New Bug description: **Summary** The speakers and headphone output do not work. GNOME and PipeWire only show "Dummy Output". The sound card `sof-soundwire` is registered, but the kernel finds no SoundWire machine driver for this laptop, so no speaker sink is created. **Hardware** - HP OmniBook X Flip Laptop 14-kb0xxx, BIOS F.10, audio subsystem ID 103c:8ea4 - Intel Core Ultra Series 3 (Panther Lake) audio controller, 8086:e428 - Realtek RT712 (SoundWire link 3), 2x TI TAS2783 speaker amps (link 2) **Versions** - Ubuntu 26.10, linux 7.3.0-9-generic (#9-Ubuntu, Oct 5 2026) - linux-firmware 20260915.git1522c78a.1ubuntu, firmware-sof-signed 2026.09-1 - alsa-ucm-conf 1.2.16.1-1ubuntu1, pipewire 1.6.8, wireplumber 0.5.17 **Steps** 1. Boot, open Settings > Sound. 2. Only "Dummy Output" is listed. `wpctl status` shows the same, and the card profile list is off / HiFi (unavailable) / pro-audio. **Expected:** speaker and headphone outputs. **Key log lines** ``` sof-audio-pci-intel-ptl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration: sof-audio-pci-intel-ptl 0000:00:1f.3: link 2 mfg_id 0x0102 part_id 0x0000 version 0x3 sof-audio-pci-intel-ptl 0000:00:1f.3: link 3 mfg_id 0x025d part_id 0x0712 version 0x3 sof-audio-pci-intel-ptl 0000:00:1f.3: Use SoundWire default machine driver with function topologies slave-tas2783 sdw:0:2:0102:0000:01:c: Direct firmware load for 8EA4-2-0xC.bin failed with error -2 slave-tas2783 sdw:0:2:0102:0000:01:9: Direct firmware load for 8EA4-2-0x9.bin failed with error -2 ``` Also `UBSAN: shift-out-of-bounds in sound/soc/sof/ipc4-topology.c:2471:13`. **Findings** - The TAS2783 driver requests `8EA4-2-0x{9,C}.bin`, but linux-firmware ships `8EA4-0-2-0x{9,C}.bin.zst` and `8EA4-1-2-0x{9,C}.bin.zst` (an extra index field). Creating symlinks for the requested names in `/lib/firmware` removes the load errors. - That does not restore sound. The kernel has no machine-driver match for RT712 + 2x TAS2783, and the ACPI tables do not describe the amps as SDCA speaker functions. Only the jack, mic and HDMI topologies get loaded, never the installed `sof-sdca-2amp-id2.tplg`. - I have not tested a kernel patch. This probably needs a `soc-acpi-intel-ptl-match.c` entry or equivalent. I have also filed it upstream with the SOF project. **Request:** please include audio support for this model in a kernel update, and align the TAS2783 firmware file naming between the kernel and linux-firmware packages. ProblemType: Bug DistroRelease: Ubuntu 26.10 Package: linux-image-7.3.0-9-generic 7.3.0-9.9 ProcVersionSignature: Ubuntu 7.3.0-9.9-generic 7.3.0-rc6 Uname: Linux 7.3.0-9-generic x86_64 ApportVersion: 2.36.0-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: kevin 8192 F.... wireplumber /dev/snd/seq: kevin 8188 F.... pipewire CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sat Oct 17 20:56:37 2026 InstallationDate: Installed on 2026-10-17 (0 days ago) InstallationMedia: Ubuntu 26.10 "Stonking Stingray" - Official amd64 (20261013) MachineType: HP HP OmniBook X Flip Laptop 14-kb0xxx ProcFB: 0 xedrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.3.0-9-generic root=UUID=be9e4e6d-9ff2-4d3c-89fe-f954199f0334 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/16/2026 dmi.bios.release: 15.10 dmi.bios.vendor: Insyde dmi.bios.version: F.10 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 8EA4 dmi.board.vendor: HP dmi.board.version: 12.26 dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 31 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.ec.firmware.release: 12.26 dmi.modalias: dmi:bvnInsyde:bvrF.10:bd04/16/2026:br15.10:efr12.26:svnHP:pnHPOmniBookXFlipLaptop14-kb0xxx:pvrType1ProductConfigId:rvnHP:rn8EA4:rvr12.26:cvnHP:ct31:cvrChassisVersion:skuDQ8R9EA#ABU:pfa103C_5335M8HPOmniBookX: dmi.product.family: 103C_5335M8 HP OmniBook X dmi.product.name: HP OmniBook X Flip Laptop 14-kb0xxx dmi.product.sku: DQ8R9EA#ABU dmi.product.version: Type1ProductConfigId dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2171307/+subscriptions