I had my Sansa Fuze plugged in and forgot about it, and shortly after I opened Rhythmbox it crashed. Unplugging the device fixed it. Here's the output:
(rhythmbox:6688): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed ** Message: pygobject_register_sinkfunc is deprecated (GstObject) libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. libusb couldn't open USB device /dev/bus/usb/002/003: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/004/002: Permission denied. libusb requires write access to USB device nodes. libusb couldn't open USB device /dev/bus/usb/006/002: Permission denied. libusb requires write access to USB device nodes. Device 0 (VID=0781 and PID=74c2) is a SanDisk Sansa Fuze v2. (rhythmbox:6688): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed PTP_ERROR_IO: failed to open session, trying again after resetting USB interface LIBMTP libusb: Attempt to reset device
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