<HTML><BODY>Hi all This is my c++ code which I use to capture screen: Display* display = XOpenDisplay(NULL); Window root = DefaultRootWindow(display); XWindowAttributes attributes = {0}; XGetWindowAttributes(display, root, &attributes); int width, height; width = attributes.width; height = attributes.height; XImage* img = XGetImage(display, root, 0, 0 , width, height, AllPlanes, ZPixmap); ... XDestroyImage(img); XCloseDisplay(display); When I run it without Xvfb I get a normal screen picture. However, when I use it in Xvfb is not not normal. For example I tried to capture youtube in firefox as a result I see some green/blue image with you tube pieces. This question was asked on stackoverflow <a href="http://stackoverflow.com/questions/42110050/xlib-and-xvfb-capture-screen" data-mce-href="http://stackoverflow.com/questions/42110050/xlib-and-xvfb-capture-screen">http://stackoverflow.com/questions/42110050/xlib-and-xvfb-capture-screen</a> and there can be seen the result image. How to fix it? -- Alex Sviridov</BODY></HTML>