I can't seem to get the Arduino IDE (1.8.4, Debian 9.1) to upload any sketches to the UDOO X86 Curie. I just get the following errors from avrdude: avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x00 avrdude: stk500_recv(): programmer is not responding avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0x00 The serial port is set to /dev/ttyACM0. Pressing the master reset didn't help -- it just hangs the upload. I also tried using dfu-util from the Intel Curie ODK (with arc/examples/ASCIITable), which seemed to work after resetting a few times but the sketch isn't running as far as I can tell (no output from the serial port): Opening DFU capable USB device... ID 8087:0aba Run-time device DFU version 0011 Claiming USB DFU Interface... Setting Alternate Setting #7 ... Determining device status: state = dfuIDLE, status = 0 dfuIDLE, continuing DFU mode device DFU version 0011 Device returned transfer size 2048 Copying data from PC to DFU device Download [=========================] 100% 48788 bytes Download done. Sent a total of 48788 bytes state(2) = dfuIDLE, status(0) = No error condition is present Done! Resetting USB to switch back to runtime mode SUCCESS: Sketch will execute in about 5 seconds. Any suggestions?