[Bug 2137423] Re: reboot=pci required for HP EliteBook Folio 9480m

** Tags added: kernel-daily-bug

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Title:
reboot=pci required for HP EliteBook Folio 9480m

Status in linux package in Ubuntu:
New

Bug description:
Without reboot=pci in the kernel command line, the laptop hangs on a
black screen after userspace shuts down. Using reboot=pci, it shuts
down as expected.

ProblemType: Bug
DistroRelease: Ubuntu 25.10
Package: linux-image-6.17.0-8-generic 6.17.0-8.8
ProcVersionSignature: Ubuntu 6.17.0-8.8-generic 6.17.2
Uname: Linux 6.17.0-8-generic x86_64
ApportVersion: 2.33.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sun Jan 4 23:11:53 2026
InstallationDate: Installed on 2026-01-04 (0 days ago)
InstallationMedia: Kubuntu 25.10 "Questing Quokka" - Release amd64 (20251007)
MachineType: Hewlett-Packard HP EliteBook Folio 9480m
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.17.0-8-generic root=UUID=d9fd0c36-1019-4498-98d0-35b91ee2efb6 ro quiet splash reboot=pci vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
firmware-sof N/A
linux-firmware 20250901.git993ff19b-0ubuntu1.4
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/03/2014
dmi.bios.release: 1.1
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: M85 Ver. 01.01
dmi.board.name: 22DA
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 92.12
dmi.chassis.asset.tag: 5CG4413FC3
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.ec.firmware.release: 146.18
dmi.modalias: dmi:bvnHewlett-Packard:bvrM85Ver.01.01:bd07/03/2014:br1.1:efr146.18:svnHewlett-Packard:pnHPEliteBookFolio9480m:pvrA3009DD10303:rvnHewlett-Packard:rn22DA:rvrKBCVersion92.12:cvnHewlett-Packard:ct10:cvr:skuK6E34UC#ABA:
dmi.product.family: 103C_5336AN G=N L=BUS B=HP S=ELI
dmi.product.name: HP EliteBook Folio 9480m
dmi.product.sku: K6E34UC#ABA
dmi.product.version: A3009DD10303
dmi.sys.vendor: Hewlett-Packard

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