Reasons why the gray screen of the UVC camera does not have images under fedora 14 and Their Solutions

As far as I know, Linux will provide a unified drive framework for USB cameras in the future, that is, UVC. However, in fedora 14, no image is displayed after the camera is connected, but the system logs and hardware feedback are displayed as normal. After installing the guvcview graphical tool through yum, we found that there is a option called privacy, which is checked by default. after removal, the normal image is displayed immediately. At the same time, it is worth noting that after guvcview is disabled, this setting seems to be saved in the system, and it will be normal to activate the camera with other programs after it is started, it seems that guvcview should call udev through v4l2, and then indirectly modify and save the privacy attribute through the UVC driver, but this is just my guess. The details need to be further explored. In fedora 13, the UVC camera can display images normally by default. It should also be related to this attribute. However, currently, cameras using the gscp driver do not have images by default, but guvcview cannot do anything about them because it does not provide privacy property control, I plan to test the gscp-related graphic tools to see if they can also provide modifications to properties similar to privacy.