Monthly Archives: July 2012

libusb couldn’t open USB device /dev/bus/usb/002/003: Permission denied.

The problem is, that libusb requires write access to USB device nodes. Check the entry

SUBSYSTEM==”usb”, ENV{DEVTYPE}==”usb_device”, MODE=”0664″

in the configuration file /etc/udev/rules.d/libusb.rules. If the file does not exist, create it. Adjust the entry to fit your needs. Maybe it is an alternative to add the current user to the group that has full usb access.