我有一个 USB 网络摄像头，在我从 20.04 升级到 23.04 之前，它运行良好。
网络摄像头在 Ubuntu 22.04 上仍然可以工作（我刚刚在另一台机器上测试过）。
更新：我也在 23.10 中测试过，但它不起作用
当我将网络摄像头连接到 Ubuntu 23.04 机器时，我在日志中收到以下错误消息（journalctl -f）：
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
它提到了“snap”和“cups”。我不知道 cups 和网络摄像头有什么关系。甚至“snap”也让我很惊讶，但我知道它可能与此有关。但是 cups 呢？
无论如何，您能发现问题吗？我还能在这里分享其他内容来找到解决方案吗？
当我在 23.10 中测试它时，我得到：
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.
答案1
只需尝试使用 Cheese 应用程序就足以看到网络摄像头确实正常工作。