I don't know if this is of any help...
But I remember vaguely to have had a similar problem a while ago with my Sanguinololu and IIRC arduino 1.6.5. It turned out to be a problem with the baud rate.
I had to modify the corresponding speed parameter in the Sanguino's boards.txt from 115200 to 57600, then I could upload correctly.
But I remember vaguely to have had a similar problem a while ago with my Sanguinololu and IIRC arduino 1.6.5. It turned out to be a problem with the baud rate.
I had to modify the corresponding speed parameter in the Sanguino's boards.txt from 115200 to 57600, then I could upload correctly.