Public bug reported:
Hardware: Lenovo ThinkPad X9-15 Gen 1 (21Q6), Lunar Lake IPU7 [8086:645d], Sony
IMX471 (ACPI SONY471A)
Kernel: 7.0.0-38-generic (same on 7.0.0-31 and 7.0.0-34)
The built-in camera never appears; there is no /dev/video* or
/dev/media*. intel-ipu7 fails to probe:
intel-ipu7 0000:00:05.0: Found supported sensor SONY471A:00
sysfs: cannot create duplicate filename '/kernel/software_nodes/SONY471A-0'
intel-ipu7 0000:00:05.0: error -EEXIST: IPU bridge init failed
intel-ipu7 0000:00:05.0: probe with driver intel-ipu7 failed with error -17
Cause: ipu_supported_sensors in ipu-bridge.ko contains SONY471A twice
(0-based entries 24 and 26). Entry 24 is upstream's, added in 6.19. Entry 26
sits just before TBE20A0, apparently added by "SAUCE: media: ipu-bridge: add
TBE20A0 ACPI id for Sony
IMX471" (LP: #2138841). The second pass registers the same software node
again, so bridge init fails.
Fix: drop the duplicated SONY471A entry from the SAUCE patch and keep TBE20A0.
---
ProblemType: Bug
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 26.04
InstallationDate: Installed on 2026-06-07 (127 days ago)
InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1)
MachineType: LENOVO 21Q6CTO1WW
Package: linux (not installed)
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=/boot/vmlinuz-7.0.0-38-generic
root=UUID=b7d46262-4dad-4721-97f0-70eba2f7aa21 ro quiet splash
crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
RebootRequiredPkgs: Error: path contained symlinks.
StagingDrivers: intel_ipu7
Tags: resolute wayland-session staging
Uname: Linux 7.0.0-38-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip docker lpadmin lxd plugdev sudo users
_MarkForUpload: True
dmi.bios.date: 06/09/2026
dmi.bios.release: 1.21
dmi.bios.vendor: LENOVO
dmi.bios.version: N4CET45W (1.21 )
dmi.board.asset.tag: Not Available
dmi.board.name: 21Q6CTO1WW
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:bvrN4CET45W(1.21):bd06/09/2026:br1.21:efr1.15:svnLENOVO:pn21Q6CTO1WW:pvrThinkPadX9-15Gen1:rvnLENOVO:rn21Q6CTO1WW: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: 21Q6CTO1WW
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: apport-collected resolute staging wayland-session
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https://bugs.launchpad.net/bugs/2170628
Title:
ipu-bridge lists SONY471A twice; IPU7 probe fails with -EEXIST on
ThinkPad X9-15 Gen 1
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