我在主机（笔记本电脑 Asus K56CB）上使用 Windows 8 + VMWare，并安装了 Ubuntu 16.04。我试图从 Ubuntu 上的网络摄像头捕获图片，但出现了问题...
我的 Ubuntu 系统将 WebCam 检测为 USB 设备：
eugen@ubuntu:~$ sudo lsusb
[sudo] password for eugen:
Bus 001 Device 003: ID 13d3:5165 IMC Networks
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 004: ID 0e0f:0008 VMware, Inc.
Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
但是当我运行 Cheese 时，只有黑屏。只有一个实用程序在工作：guvcview
Util xcam 给了我下一个错误：
eugen@ubuntu:/usr/local/share/OpenCV/samples/python$ xcam
[xcam] No vidcams were identified. If you were expecting something
different, check that the vidcam is plugged in, turned on and
detected by sane-find-scanner (if appropriate). Please read
the documentation which came with this software (README, FAQ,
manpages).
eugen@ubuntu:/usr/local/
可能存在什么问题？