So I just received my UDOO (quad) a little while ago. I used the linux sdcard and updated following the directions. My UDOO boots up fine. However, if I leave it, then it will lock up after several hours and require a reset/power cycle to become usable again. I have wired ethernet, USB keyboard and mouse and an HDMI TV/monitor. On my UDOO, I booted it up and opened a terminal window, so that I could verify if typing anything on the keyboard would respond. On my desktop machine, I started: ping -i 60 IP-Address-of-UDOO and it lasted for 3845 seconds (about 58 hours) before the pings started to fail. The keyboard and mouse were also unresponsive. A previous time I tried this (but without the pings), it lasted less than 12 hours before locking up. The heatsink on the UDOO was warm to the touch, but not overly so. I thought I'd ask if this was a known issue, and whether there was any additional information I can grab that would be useful.