I use Ubuntu 15.04, and Cheese program does not work, when I go to a photo shoot get the following error:

[Armando A. Roque Estrada]

 (cheese:29065): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files libv4l2: error setting pixformat: Dispositivo o recurso ocupado

(cheese:29065): cheese-WARNING **: El dispositivo «/dev/video0» está ocupado: gstv4l2object.c(2838): gst_v4l2_object_set_format (): /GstCameraBin:camerabin/GstWrapperCameraBinSrc:camera_source/GstBin:bin18/GstV4l2Src:video_source: Call to S_FMT failed for YU12 @ 1280x1024: Dispositivo o recurso ocupado

Says I have used just the webcam, but it is false. The program opens but does not draw pictures in Ubuntu 14.04 working correctly

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.