Issue with my board?

Using Arduino IDE 1.x
2

Some points

  1. Correct port selected?
  2. Still on the same (version of the) operating system?
    No updates applied?
    Which OS?
  3. Any additional info in dmesg and lsusb?
  4. If your board does not use the CH340 TTL-to-USB converter, have you done the Loop-Back Test Instructions?