• Recent
    • Docs
    • Github
    • 百度网盘
    • Onedrive
    • Official
    • Shop
    • Register
    • Login

    no webcam/device not found

    Scheduled Pinned Locked Moved PI CM5 Laptop
    12 Posts 2 Posters 727 Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • M
      Momo 0
      last edited by

      kernel 6.1.75, i have no video0 device under /dev/ and cheese for example doesn't show a webcam either, any idea?

      G 1 Reply Last reply Reply Quote 0
      • G
        george @Momo 0
        last edited by

        @Momo-0
        Please confirm which image you are using, and you can also use the following command to view the USB device:

        lsusb
        M 1 Reply Last reply Reply Quote 0
        • M
          Momo 0 @george
          last edited by Momo 0

          @george
          Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
          Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
          Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
          Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
          Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
          Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
          Bus 006 Device 002: ID 1c4f:006b SiGma Micro USB Keyboard
          Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
          Bus 007 Device 002: ID 1a86:8091 QinHeng Electronics USB HUB
          Bus 007 Device 003: ID 0bda:b85b Realtek Semiconductor Corp. Bluetooth Radio

          image is 20241004-ubuntu-24.04-preinstalled-desktop-arm64-laptop-v20

          G 1 Reply Last reply Reply Quote 0
          • G
            george @Momo 0
            last edited by

            @Momo-0
            Confirm that the USB camera device has not been recognized, and verify if other images are functioning properly or if all images are no longer recognized properly. If so, there may be hardware abnormalities.
            When the machine is powered off, unplug the LCD cable again. The USB signal of the camera is connected to the LCD cable.

            M 2 Replies Last reply Reply Quote 0
            • M
              Momo 0 @george
              last edited by

              @George tried and older image with kernel 5, and tried to unseat and clan the cable of the monitor with 99% alcohol, still no video device

              1 Reply Last reply Reply Quote 0
              • M
                Momo 0 @george
                last edited by

                @George any idea what else I can try? I see no reason the camera would be damaged, im pretty careful around my stuff

                G 1 Reply Last reply Reply Quote 0
                • G
                  george @Momo 0
                  last edited by

                  @Momo-0
                  From the phenomenon, it appears that there is a hardware malfunction, such as a damaged camera module or connector.
                  If you have a certain hardware foundation, you can provide drawings and methods to guide troubleshooting.

                  M 1 Reply Last reply Reply Quote 0
                  • M
                    Momo 0 @george
                    last edited by

                    @george is there any chance i could get a replacement screen/camera?

                    G M 2 Replies Last reply Reply Quote 0
                    • G
                      george @Momo 0
                      last edited by

                      @Momo-0
                      Need to cooperate with testing first to determine where the problem lies?

                      1. Connect the LCD cable and use a multimeter to test the ground impedance of the two PINs shown in the figure below
                      2. Disconnect the LCD cable and use the same method to test the ground impedance of two PINs
                        Test method: Set the multimeter to the diode position, connect the red probe to GND, and connect the black probe to the signal.
                        4bfb9359-2697-4e1e-bb80-2228d997b0d3-image.png
                      1 Reply Last reply Reply Quote 0
                      • M
                        Momo 0 @Momo 0
                        last edited by

                        @Momo-0 I tested both Pins with and without the LCD cable attached, but I get no connectivity between them and ground. No beeping

                        1 Reply Last reply Reply Quote 0
                        • M
                          Momo 0
                          last edited by

                          Would love to daily-drive this laptop, but i kinda need a webcam to do that

                          1 Reply Last reply Reply Quote 0
                          • M
                            Momo 0
                            last edited by

                            After letting the Laptop rest for a few days, the cam was back shortly, went away after a few seconds though.

                            1 Reply Last reply Reply Quote 0
                            • 1 / 1
                            • First post
                              Last post