apport information ** Tags added: apport-collected resolute
** Description changed: May be interesting though specific to HP Zbook Fury 15 G8 could be the case. Found on HP site: "ALC285 GPIO AMP init race with SOF topology load on HP ZBook Fury 15 G8 — Speaker variant intermittently missing from ACP probe." It seems the hardware has an external speaker amplifier that requires GPIO initialization from the ALC285 codec. That init is not ready when SOF DSP routing wants to apply the topology causing the default profile to intermittently switch and one experiences unstable audio conditions after login on Plasma 6. More precisely, wireplumber picks whichever HiFi variant is available when it probes, and persists that choice. If only the Headphones variant materialized first, it saves Headphones. The user then has to force Speaker. --- I applied a work-around that is the setup of a user-level systemd service that restarts wireplumber until it finds a profile (5 restarts set, usually takes 3). Then it sets the speaker profile using pactl and reloads the daemon. Works every time. --- Launchpad #1930707 added the ALC285_FIXUP_HP_GPIO_AMP_INIT quirk for this exact PCI SSID (103c:8870). That fix addressed the LED and right-channel-silent symptoms. The timing race against SOF topology load is another manifestation of the un-timed sequence between GPIO and SOF/DSP. + --- + ProblemType: Bug + ApportVersion: 2.34.1-0ubuntu0.1 + Architecture: amd64 + CasperMD5CheckResult: unknown + CurrentDesktop: KDE + DistroRelease: Ubuntu 26.04 + MachineType: HP HP ZBook Fury 15.6 inch G8 Mobile Workstation PC + NonfreeKernelModules: nvidia_modeset nvidia + Package: linux (not installed) + ProcFB: 0 i915drmfb + ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic root=UUID=e601d232-e30d-4b4c-9f0d-4c41b2f3a488 ro intel_iommu=on iommu=pt i915.enable_guc=2 preempt=full rcu_nocbs=all preempt=full threadirqs rcu_nocbs=all + ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14 + PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. + Tags: resolute + Uname: Linux 7.0.0-38-generic x86_64 + UpgradeStatus: Upgraded to resolute on 2026-09-30 (20 days ago) + UserGroups: N/A + _MarkForUpload: True + dmi.bios.date: 08/20/2025 + dmi.bios.release: 22.0 + dmi.bios.vendor: HP + dmi.bios.version: T95 Ver. 01.22.00 + dmi.board.name: 8870 + dmi.board.vendor: HP + dmi.board.version: KBC Version 52.41.00 + dmi.chassis.type: 10 + dmi.chassis.vendor: HP + dmi.ec.firmware.release: 82.65 + dmi.modalias: dmi:bvnHP:bvrT95Ver.01.22.00:bd08/20/2025:br22.0:efr82.65:svnHP:pnHPZBookFury15.6inchG8MobileWorkstationPC:pvrSBKPFV3:rvnHP:rn8870:rvrKBCVersion52.41.00:cvnHP:ct10:cvr:sku4N4Z7AV:pfa103C_5336ANHPZBook: + dmi.product.family: 103C_5336AN HP ZBook + dmi.product.name: HP ZBook Fury 15.6 inch G8 Mobile Workstation PC + dmi.product.sku: 4N4Z7AV + dmi.product.version: SBKPFV3 + dmi.sys.vendor: HP ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/2170445/+attachment/6010940/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2170445 Title: Race condition at kernel boot time SOF & GPIO AMP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2170445/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
