Public bug reported:
A bus-powered JHL7440 Thunderbolt enclosure containing an AQC113
spontaneously disconnects on both USB4 ports. The Thunderbolt device
reconnects, but its PCI hierarchy is not restored reliably. In one
captured recovery the AQC113 appeared after bridge-window allocation,
received no BAR resources, and failed probe with error -5. Removing the
complete JHL7440 PCI subtree and rescanning the empty parent bus resized
the bridge windows and restored 10GbE without rebooting.
GEEKOM A7 Max, BIOS 1.26
Ubuntu and 7.0.0-31-generic
Wavlink WL-NWU342G, JHL7440, NVM 69.84
AQC113 firmware 1.5.48
Both USB4 ports affected
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-31-generic 7.0.0-31.31
ProcVersionSignature: Ubuntu 7.0.0-31.31-generic 7.0.14
Uname: Linux 7.0.0-31-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k7.0.0-31-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/controlC1',
'/dev/snd/hwC1D0', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D0p',
'/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0',
'/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p',
'/dev/snd/pcmC0D3p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
CasperMD5CheckResult: pass
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read
kernel buffer failed: Operation not permitted
Date: Sun Sep 13 16:17:22 2026
InstallationDate: Installed on 2026-08-15 (29 days ago)
InstallationMedia: Ubuntu-Server 26.04 "Resolute Raccoon" - Release amd64
(20260420.1)
MachineType: GEEKOM A7 Max
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-31-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
pcie_aspm.policy=performance iommu=pt pci=nocrs pcie_port_pm=off
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
acpidump:
dmi.bios.date: 09/15/2025
dmi.bios.release: 1.26
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 1.26
dmi.board.asset.tag: Default string
dmi.board.name: A7 Max
dmi.board.vendor: Default string
dmi.board.version: Default string
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.ec.firmware.release: 1.3
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr1.26:bd09/15/2025:br1.26:efr1.3:svnGEEKOM:pnA7Max:pvrDefaultstring:rvnDefaultstring:rnA7Max:rvrDefaultstring:cvnDefaultstring:ct3:cvrDefaultstring:skuGEEKOMA7Max:pfaA...MaxSeries:
dmi.product.family: A...Max Series
dmi.product.name: A7 Max
dmi.product.sku: GEEKOM A7 Max
dmi.product.version: Default string
dmi.sys.vendor: GEEKOM
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute
** Attachment added: "hardware and package versions, topology, spontaneous
failure, BAR-allocation failure,"
https://bugs.launchpad.net/bugs/2167202/+attachment/5999969/+files/ubuntu-thunderbolt-aqc113-bug-report.txt
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https://bugs.launchpad.net/bugs/2167202
Title:
thunderbolt/pci JHL7440/AQC113 fails to recover after tunnel
disconnect; BAR allocation fails
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