Public bug reported:
Hardware: Dell XPS 13 9320 (Alder Lake), MIPI camera OV01A10 behind
Intel IPU6, IVSC (mei_vsc, ivsc_csi, ivsc_ace) and USB-LJCA bridge.
OS: Ubuntu 26.04, kernel 7.0.0-38-generic, BIOS 2.32.0.
Camera userspace: Ubuntu IPU6 camera HAL + v4l2-relayd (v4l2loopback).
Steps to reproduce:
1. Boot; the camera works (ffplay /dev/video0 shows an image, LED on).
2. systemctl hibernate, then resume.
3. Open the camera: black frames, camera LED stays off.
Expected: the camera works after resume from hibernation, as it does
after a normal boot.
Actual: on resume, dmesg shows the sensor being removed (call traces in
ov01a10_power_off() called from ov01a10_remove()), the IVSC being
re-initialised ("intel_vsc intel_vsc: silicon stepping version is 0:2"),
and then:
ivsc_csi intel_vsc-92335fcf-...: mei-csi probed without device fwnode!
After this, the sensor is missing from the media graph
(media-ctl -p -d /dev/media0 shows no ov01a10 entity) and the camera HAL
falls back to a generic sensor configuration (loads AR0234_TGL_10bits.aiqb
instead of ov01a10.aiqb), failing with "Stream config is not supported"
or waitFrame timeouts.
Recovery attempts that do NOT work (relay service stopped first):
- reloading intel_ipu6 / intel_ipu6_isys / intel_ipu6_psys only;
- additionally reloading ov01a10, ivsc_csi, ivsc_ace, ipu_bridge
(with intel_ipu6 loaded before ivsc_csi and ov01a10);
- reloading the full chain: usb_ljca, gpio_ljca, i2c_ljca, spi_ljca,
intel_skl_int3472_discrete, mei_vsc_hw, mei_vsc, ivsc_ace, intel_ipu6,
ivsc_csi, ov01a10, isys, psys.
In every case "mei-csi probed without device fwnode!" reappears and only
a reboot restores the camera.
Possible cause (hypothesis): on restore from hibernation the USB-LJCA
device is unbound and re-bound instead of being resumed, so the IVSC and
sensor devices are recreated after ipu_bridge has assigned the software
fwnode graph, and that graph is not rebuilt for the new devices.
Suspend-to-idle (s2idle) does not trigger this problem.
ProblemType: Bug
DistroRelease: Ubuntu 26.04
Package: linux-image-7.0.0-38-generic 7.0.0-38.38
ProcVersionSignature: Ubuntu 7.0.0-38.38-generic 7.0.14
Uname: Linux 7.0.0-38-generic x86_64
ApportVersion: 2.34.1-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: vittorio 6322 F.... pipewire
vittorio 6332 F.... wireplumber
/dev/snd/seq: vittorio 6322 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: pass
CurrentDesktop: GNOME
Date: Thu Oct 22 12:26:48 2026
HibernationDevice: RESUME=UUID=c858e7ff-beb9-4bc7-89b3-dfe8c0d001d5
InstallationDate: Installed on 2023-07-04 (1206 days ago)
InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64
(20230223)
MachineType: Dell Inc. XPS 9320
ProcEnviron:
LANG=it_IT.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 i915drmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-38-generic
root=UUID=c858e7ff-beb9-4bc7-89b3-dfe8c0d001d5 ro quiet splash
resume=UUID=c858e7ff-beb9-4bc7-89b3-dfe8c0d001d5 resume_offset=116736
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: linux
UpgradeStatus: Upgraded to resolute on 2026-10-07 (15 days ago)
dmi.bios.date: 07/23/2026
dmi.bios.release: 2.32
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.32.0
dmi.board.name: 07608N
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.ec.firmware.release: 1.17
dmi.modalias:
dmi:bvnDellInc.:bvr2.32.0:bd07/23/2026:br2.32:efr1.17:svnDellInc.:pnXPS9320:pvr:rvnDellInc.:rn07608N:rvrA00:cvnDellInc.:ct10:cvr:sku0C10:pfaXPS:
dmi.product.family: XPS
dmi.product.name: XPS 9320
dmi.product.sku: 0C10
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug resolute wayland-session
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https://bugs.launchpad.net/bugs/2171924
Title:
[Dell XPS 13 9320] IPU6 MIPI camera (OV01A10 via IVSC/USB-LJCA) broken
after hibernation: "mei-csi probed without device fwnode", only reboot
recovers
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