戴尔Precision 5480运行Ubuntu系统时内置摄像头无法识别的问题求助

Hey there! Sorry to hear you're stuck with the "NO Device Found" error when trying to use your Dell Precision 5480's built-in webcam on Ubuntu. Let's walk through some troubleshooting steps to get this sorted out:

• Check if the hardware is detected by the system
  Fire up a terminal and run the following commands to see if your webcam is being recognized at the hardware level:

  • lsusb: Look for entries like Integrated Camera or Dell Camera in the output. If you see it, the hardware is detected—we can focus on software/driver issues. If not, it might be disabled or have a hardware fault.
  • lspci: Though most webcams are USB-based, this command checks for PCI-connected devices, just in case.

• Verify the webcam isn't disabled

  • First, check for a physical switch or Fn shortcut (like Fn + F8, depending on your keyboard layout) that might toggle the webcam on/off—Dell laptops often include this.
  • Head to Ubuntu's system settings: Settings > Privacy & Security > Camera and make sure the toggle for allowing apps to access the camera is turned on.

• Troubleshoot driver and system updates

  • Keep your system and firmware up to date, as this often fixes hardware compatibility issues:

    sudo apt update && sudo apt upgrade -y
    sudo fwupdmgr update
    

  • Install the cheese tool (a simple webcam tester) to rule out issues with your default camera app:

    sudo apt install cheese
    

    Run cheese from the terminal or app menu to see if it can detect the camera.
  • Check if the UVC driver (used by most USB webcams) is loaded:

    lsmod | grep uvcvideo
    

    If there's no output, try loading it manually with sudo modprobe uvcvideo, then test again.

• Check BIOS settings
  Restart your laptop and press F2 (or Del, depending on your model) to enter BIOS. Look for sections like Security or Devices, and make sure the Integrated Camera option is set to Enabled. Save changes and reboot to test.

• Rule out software conflicts

  • Close all video-related apps (Zoom, Teams, Skype, etc.)—sometimes these can lock the camera resource, preventing other tools from accessing it.
  • If you just installed Ubuntu and ran into this issue, try using the latest official Ubuntu ISO to re-install, or switch to a stable LTS kernel version if you're on a newer experimental kernel.

If none of these steps work, it might be a hardware issue—you could reach out to Dell support for further diagnostics. Hope this helps you get your webcam up and running!

备注：内容来源于stack exchange，提问作者noaa maman