I have this USB webcam that was working fine until I upgraded from 20.04 to 23.04.
The webcam still works on Ubuntu 22.04 (I've just tested it on another machine).
I also tested in 23.10 and it doesn't work
The output from journalctl running in 23.04 and 23.10 are in the tar file attached.
This bug report is suggested in the original support request I made in Askubuntu: https://askubuntu.com/questions/1486233/webcam-stoped-working-after-upgrading-from-20-04-to-23-04?noredirect=1#comment2603531_1486233
For convenience, I'm pasting the output also here, first the 23.04 and then the 23.10 output, and that's all, no more text after the output:
23.04:
```
Sep 18 12:59:33 HOST-NAME kernel: usb 3-5: new high-speed USB device number 18 using xhci_hcd
Sep 18 12:59:33 HOST-NAME kernel: usb 3-5: New USB device found, idVendor=046d, idProduct=082b, bcdDevice=28.26
Sep 18 12:59:33 HOST-NAME kernel: usb 3-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 18 12:59:33 HOST-NAME kernel: usb 3-5: Product: Webcam C170
Sep 18 12:59:33 HOST-NAME kernel: usb 3-5: Manufacturer:
Sep 18 12:59:33 HOST-NAME kernel: usb 3-5: Found UVC 1.00 device Webcam C170 (046d:082b)
Sep 18 12:59:33 HOST-NAME kernel: input: Webcam C170: Webcam C170 as /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.0/input/input38
Sep 18 12:59:34 HOST-NAME mtp-probe[996248]: checking bus 3, device 18: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-5"
Sep 18 12:59:34 HOST-NAME mtp-probe[996248]: bus: 3, device: 18 was not an MTP device
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5:1.1: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_cupsd /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.1 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996254]: 3-5:1.3: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_cupsd /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.3 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996254]: 3-5:1.3: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_ippeveprinter /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.3 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5:1.1: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_ippeveprinter /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.1 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5:1.2: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_cupsd /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.2 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5:1.2: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_ippeveprinter /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.2 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5:1.0: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_cupsd /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.0 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5:1.0: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_ippeveprinter /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5:1.0 0:0' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME mtp-probe[996302]: checking bus 3, device 18: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-5"
Sep 18 12:59:34 HOST-NAME mtp-probe[996302]: bus: 3, device: 18 was not an MTP device
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_cupsd /devices/pci0000:00/0000:00:14.0/usb3/3-5 189:273' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME systemd-udevd[996251]: 3-5: Process '/usr/lib/snapd/snap-device-helper bind snap_cups_ippeveprinter /devices/pci0000:00/0000:00:14.0/usb3/3-5 189:273' failed with exit code 1.
Sep 18 12:59:34 HOST-NAME wireplumber[901535]: <WpPortalPermissionStorePlugin:0x564ee8807980> Failed to call Lookup: GDBus.Error:org.freedesktop.portal.Error.NotFound: No entry for camera
```
23.10:
```
Sep 21 19:31:58 ubuntu systemd[1]: systemd-localed.service: Deactivated successfully.
Sep 21 19:32:04 ubuntu kernel: usb 3-8: new high-speed USB device number 6 using xhci_hcd
Sep 21 19:32:04 ubuntu kernel: usb 3-8: New USB device found, idVendor=046d, idProduct=082b, bcdDevice=28.26
Sep 21 19:32:04 ubuntu kernel: usb 3-8: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Sep 21 19:32:04 ubuntu kernel: usb 3-8: Product: Webcam C170
Sep 21 19:32:04 ubuntu kernel: usb 3-8: Manufacturer:
Sep 21 19:32:04 ubuntu mtp-probe[4921]: checking bus 3, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-8"
Sep 21 19:32:04 ubuntu mtp-probe[4921]: bus: 3, device: 6 was not an MTP device
Sep 21 19:32:04 ubuntu kernel: mc: Linux media interface: v0.10
Sep 21 19:32:04 ubuntu kernel: videodev: Linux video capture interface: v2.00
Sep 21 19:32:04 ubuntu kernel: usbcore: registered new interface driver snd-usb-audio
Sep 21 19:32:04 ubuntu kernel: usb 3-8: Found UVC 1.00 device Webcam C170 (046d:082b)
Sep 21 19:32:04 ubuntu kernel: usbcore: registered new interface driver uvcvideo
Sep 21 19:32:04 ubuntu mtp-probe[4931]: checking bus 3, device 6: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-8"
Sep 21 19:32:04 ubuntu mtp-probe[4931]: bus: 3, device: 6 was not an MTP device
Sep 21 19:32:04 ubuntu (udev-worker)[4920]: controlC2: Process '/usr/sbin/alsactl -E HOME=/run/alsa -E XDG_RUNTIME_DIR=/run/alsa/runtime restore 2' failed with exit code 99.
Sep 21 19:32:04 ubuntu systemd[2463]: Reached target sound.target - Sound Card.
Sep 21 19:32:04 ubuntu wireplumber[2474]: <WpPortalPermissionStorePlugin:0x55ba448edf30> Failed to call Lookup: GDBus.Error:org.freedesktop.portal.Error.NotFound: No entry for camera
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.squashfs...................................../casper/minimal.squashfs: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.es.squashfs.gpg..../casper/minimal.enhanced-secureboot.es.squashfs.gpg: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.en.squashfs..../casper/minimal.enhanced-secureboot.en.squashfs: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.es.manifest..../casper/minimal.standard.es.manifest: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.ru.manifest..../casper/minimal.ru.manifest: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.es.manifest..../casper/minimal.enhanced-secureboot.es.manifest: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.en.squashfs...../casper/minimal.standard.en.squashfs: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.pt.manifest..../casper/minimal.pt.manifest: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.fr.size..../casper/minimal.fr.size: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.de.squashfs.gpg..../casper/minimal.standard.de.squashfs.gpg: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.manifest..../casper/minimal.enhanced-secureboot.manifest: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.fr.manifest..../casper/minimal.fr.manifest: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.squashfs.gpg..../casper/minimal.squashfs.gpg: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.en.size..../casper/minimal.enhanced-secureboot.en.size: OK
Sep 21 19:32:04 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.enhanced-secureboot.ru.manifest..../casper/minimal.standard.enhanced-secureboot.ru.manifest: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.enhanced-secureboot.squashfs........./casper/minimal.standard.enhanced-secureboot.squashfs: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.fr.size..../casper/minimal.standard.fr.size: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.es.squashfs.gpg..../casper/minimal.es.squashfs.gpg: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.standard.es.size..../casper/minimal.standard.es.size: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.no-languages.manifest..../casper/minimal.no-languages.manifest: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.it.size..../casper/minimal.enhanced-secureboot.it.size: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.no-languages.squashfs..../casper/minimal.no-languages.squashfs: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./casper/minimal.enhanced-secureboot.de.squashfs.gpg..../casper/minimal.enhanced-secureboot.de.squashfs.gpg: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./.disk/cd_type..../.disk/cd_type: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./.disk/base_installable..../.disk/base_installable: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./.disk/info..../.disk/info: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./.disk/casper-uuid-generic..../.disk/casper-uuid-generic: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Checking ./.disk/release_notes_url...../.disk/release_notes_url: OK
Sep 21 19:32:10 ubuntu casper-md5check[3451]: Check finished: no errors found.
Sep 21 19:32:10 ubuntu systemd[1]: Finished casper-md5check.service - casper-md5check Verify Live ISO checksums.
Sep 21 19:32:10 ubuntu systemd[1]: Startup finished in 8.401s (kernel) + 3min 13.015s (userspace) = 3min 21.416s.
``