With mga3 LXDE Cheese start but do not work with webcams. I tested with three webcams (logitech, phillips, creative). It recognize them but there is no picture.
Here are the messages from the console : [jacques@localhost ~]$ LC_ALL=C cheese (cheese:2834): GStreamer-CRITICAL **: gst_preset_load_preset: assertion `GST_IS_PRESET (preset)' failed (cheese:2834): cheese-WARNING **: Can't find vp8enc preset: "Profile Realtime", using alternate preset: "Cheese Realtime". If you see this, make a bug report! (cheese:2834): GStreamer-CRITICAL **: gst_preset_load_preset: assertion `GST_IS_PRESET (preset)' failed (cheese:2834): cheese-WARNING **: Can't find vp8enc preset: "Cheese Realtime", creating new userspace preset. (cheese:2834): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed (cheese:2834): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed (cheese:2834): GStreamer-CRITICAL **: gst_preset_save_preset: assertion `GST_IS_PRESET (preset)' failed (cheese:2834): GStreamer-CRITICAL **: gst_object_unref: assertion `object != NULL' failed (cheese:2834): cheese-WARNING **: Your GStreamer installation is missing a plug-in. [jacques@localhost ~]$
Now Cheese works fine. I make this bug resolved.
Status: NEW => RESOLVEDResolution: (none) => FIXED