不再检测到 USB 摄像头

Question

我有一个 USB 摄像头，它曾经在我的 Ubuntu（当前版本 18.04.4 LTS，Linux E480 4.15.0-88-generic #88-Ubuntu SMP）上工作得很好，即插即用。现在，几个月来它没有检测到。

插入相机后，dmesg的尾部给出

[ 5862.596999] usb 1-3: new high-speed USB device number 15 using xhci_hcd
[ 5862.798746] usb 1-3: config 1 interface 1 altsetting 0 endpoint 0x82 has wMaxPacketSize 0, skipping
[ 5862.799144] usb 1-3: New USB device found, idVendor=1742, idProduct=0307
[ 5862.799149] usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5862.799154] usb 1-3: Product: NCM03-V-02
[ 5862.799157] usb 1-3: Manufacturer: Nippon Chemi-Con Corporation
[ 5862.800479] uvcvideo: Found UVC 1.00 device NCM03-V-02 (1742:0307)
[ 5862.800516] uvcvideo: No streaming interface found for terminal 2.
[ 5862.800524] uvcvideo 1-3:1.0: Entity type for entity Extension 4 was not initialized!
[ 5862.800531] uvcvideo 1-3:1.0: Entity type for entity Processing 3 was not initialized!
[ 5862.800535] uvcvideo 1-3:1.0: Entity type for entity Camera 1 was not initialized!
[ 5862.801081] input: NCM03-V-02 as /devices/pci0000:00/0000:00:14.0/usb1/1-3/1-3:1.0/input/input25

和 lsusb 显示此条目：

    Bus 001 Device 015: ID 1742:0307  

和 lsusb -t 这些（在总线 01 下）：

    |__ Port 3: Dev 15, If 0, Class=Video, Driver=uvcvideo, 480M
    |__ Port 3: Dev 15, If 1, Class=Video, Driver=, 480M

但是，相机未列在 中/dev/v4l/*，因此不在 中/dev/video*。 v4l2-ctl --list-devices不显示相机。

我试图通过例如重新安装 v4l-utils 并重新添加模块 uvcvideo 和 xhci_hcd 来解决这个问题。

我假设消息“未找到终端的流接口”和“实体 X 未初始化！” 不是一个好兆头，但互联网搜索对我没有帮助。

我有一个双启动（Linux / Windows）并且相机在 Windows 上工作。

有什么帮助吗？

Answer 1

我遇到了类似的问题，包uvcdynctrl解决了它。

$ sudo apt install uvcdynctrl

Answer 2

我遇到了类似的问题，并在中找到了以下消息dmesg

[  119.312320] usb 1-5: Product: HD WebCam
[  119.312322] usb 1-5: Manufacturer: Generic
[  119.312325] usb 1-5: SerialNumber: XXXXXXXXXXXX
[  119.314500] uvcvideo: Found UVC 1.00 device HD WebCam (0408:a060)
[  119.317874] uvcvideo 1-5:1.0: Entity type for entity Extension 4 was not initialized!
[  119.317880] uvcvideo 1-5:1.0: Entity type for entity Processing 2 was not initialized!
[  119.317885] uvcvideo 1-5:1.0: Entity type for entity Camera 1 was not initialized!

遇到这个答案，它建议重新安装usbutils。之后我的笔记本电脑开始检测我的相机。