Public bug reported:
The integrated webcam is not detected on Ubuntu 26.04 LTS.
Hardware:
- Lenovo ThinkPad (Machine Type: 21Q6001FMX)
- Intel Lunar Lake
- Intel IPU7
- BIOS N4CET44W (1.20)
Kernel:
7.0.0-27-generic
Symptoms:
- No /dev/video* devices are created.
- Firefox and Microsoft Teams cannot detect a camera.
Relevant kernel messages:
Found supported sensor SONY471A:00
kobject_add_internal failed for SONY471A-0 with -EEXIST
intel-ipu7: error -EEXIST: IPU bridge init failed
intel-ipu7: probe with driver intel-ipu7 failed with error -17
refcount_t: addition on 0; use-after-free
The IPU7 firmware loads successfully and the sensor is detected, but
driver initialization fails before any video device is created.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-27-generic 7.0.0-27.27
ProcVersionSignature: Ubuntu 7.0.0-27.27-generic 7.0.6
Uname: Linux 7.0.0-27-generic x86_64
ApportVersion: 2.34.0-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: markuserlach 5209 F.... pipewire
markuserlach 5231 F.... wireplumber
/dev/snd/seq: markuserlach 5209 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jul 8 09:48:28 2026
InstallationDate: Installed on 2026-07-07 (1 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 21Q6001FMX
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 xedrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-27-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
SourcePackage: linux
StagingDrivers: intel_ipu7
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/27/2026
dmi.bios.release: 1.20
dmi.bios.vendor: LENOVO
dmi.bios.version: N4CET44W (1.20 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21Q6001FMX
dmi.board.vendor: LENOVO
dmi.board.version: SDK0T76576 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.15
dmi.modalias:
dmi:bvnLENOVO:bvrN4CET44W(1.20):bd04/27/2026:br1.20:efr1.15:svnLENOVO:pn21Q6001FMX:pvrThinkPadX9-15Gen1:rvnLENOVO:rn21Q6001FMX:rvrSDK0T76576WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_21Q6_BU_Think_FM_ThinkPadX9-15Gen1:pfaThinkPadX9-15Gen1:
dmi.product.family: ThinkPad X9-15 Gen 1
dmi.product.name: 21Q6001FMX
dmi.product.sku: LENOVO_MT_21Q6_BU_Think_FM_ThinkPad X9-15 Gen 1
dmi.product.version: ThinkPad X9-15 Gen 1
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute staging wayland-session
** Attachment added: "kernel.log"
https://bugs.launchpad.net/bugs/2160114/+attachment/5980678/+files/kernel.log
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https://bugs.launchpad.net/bugs/2160114
Title:
Intel IPU7 camera fails to initialize on Lunar Lake ThinkPad
(SONY471A, -EEXIST, no /dev/video0)
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