hi, I too am having problems getting the webcam working on my "Dell Inc. XPS 9320/0P9FNW, BIOS 1.4.0 05/13/2022" running jammy. I only have http://fr.archive.ubuntu.com/ubuntu/ and http://security.ubuntu.com/ubuntu as sources in /etc/apt. I have oem-somerville-tentacool-meta 22.04~ubuntu1 and libcanberra-gtk3-module:amd64 0.30-10ubuntu1 installed.  I have the 5.15.0-52-generic kernel. I have looked at https://wiki.ubuntu.com/Dell but the instructions seem to be out of date.  Thanks for any help, Stuart

zbarcam causes dmesg to output "intel-ipu6-isys intel-ipu6-isys0: dma_alloc_coherent of size 536903680 failed"

stuart@xps9320:/etc/apt$ zbarcam 
Using mplane plugin for capture 
libv4l2: error turning on stream: Link has been severed
ERROR: zbar processor in v4l2_start():
    system error: starting video stream (VIDIOC_STREAMON): Link has been severed (67)
stuart@xps9320:/etc/apt$ cheese 
../src/intel/isl/isl.c:2220: FINISHME: ../src/intel/isl/isl.c:isl_surf_supports_ccs: CCS for 3D textures is disabled, but a workaround is available.
(cheese:7404): cheese-WARNING **: 00:53:26.993: Device '/dev/video0' does not support 2:0:0:0 colourimetry: ../sys/v4l2/gstv4l2object.c(4105): gst_v4l2_object_set_format_full (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin18/GstV4l2Src:v4l2src1:
Device wants 2:0:0:0 colorimetry

stuart@xps9320:/etc/apt$ chromium https://webcamtests.com/ 
Gtk-Message: 00:57:53.924: Failed to load module "canberra-gtk-module"
Gtk-Message: 00:57:53.925: Failed to load module "canberra-gtk-module"
WARNING: Kernel has no file descriptor comparison support: Operation not permitted
[7612:7701:1029/005757.683021:ERROR:udev_watcher.cc(98)] Failed to begin udev enumeration.

stuart@xps9320:/etc/apt$ firefox https://webcamtests.com/ 
Gtk-Message: 01:06:54.292: Failed to load module "canberra-gtk-module"
Gtk-Message: 01:06:54.293: Failed to load module "canberra-gtk-module"

stuart@xps9320:/etc/apt$ sudo dmesg | grep ipu6
[   11.006142] intel-ipu6 intel-ipu: enabling device (0000 -> 0002)
[   11.006332] intel-ipu6 intel-ipu: Device 0x465d (rev: 0x2)
[   11.006351] intel-ipu6 intel-ipu: physical base address 0x603c000000
[   11.006352] intel-ipu6 intel-ipu: mapped as: 0x000000004d40cc25
[   11.006446] intel-ipu6 intel-ipu: Unable to set secure mode
[   11.006446] intel-ipu6 intel-ipu: IPU in non-secure mode
[   11.006450] intel-ipu6 intel-ipu: Skip ipc reset for non-secure mode
[   11.006451] intel-ipu6 intel-ipu: IPC reset done
[   11.006451] intel-ipu6 intel-ipu: cpd file name: intel/ipu6ep_fw.bin
[   11.008293] intel-ipu6 intel-ipu: FW version: 20211011
[   11.131890] intel-ipu6 intel-ipu: IPU driver version 1.0
[   20.435874] intel-ipu6-psys intel-ipu6-psys0: pkg_dir entry count:8
[   20.435988] intel-ipu6-psys intel-ipu6-psys0: psys probe minor: 0
[   20.575899] intel-ipu6-isys intel-ipu6-isys0: bind ov01a10 17-0036 nlanes is 1 port is 2
[   20.576105] intel-ipu6-isys intel-ipu6-isys0: All sensor registration completed.
[  936.060203] intel-ipu6-isys intel-ipu6-isys0: dma_alloc_coherent of size 536903680 failed
[ 1347.230485] intel-ipu6-isys intel-ipu6-isys0: dma_alloc_coherent of size 536903680 failed
[ 1821.440819] intel-ipu6-isys intel-ipu6-isys0: dma_alloc_coherent of size 536903680 failed
[ 1953.807143] intel-ipu6-isys intel-ipu6-isys0: dma_alloc_coherent of size 536903680 failed