I found My Odroid u3 would not connect to my arduino - the reason being MRL thought the u3 was a raspberry pi and had a slight library misdirection. If you look at .myrobotlab.sh in gedit you'll see:

#!/bin/sh

# Mac's don't use LD_LIBRARY_PATH yet its
# required to load shared objects on Linux systems
LD_LIBRARY_PATH=`pwd`/libraries/native/arm.32.linux:`pwd`/libraries/native/x86.32.linux:`pwd`/libraries/native/x86.64.linux:${LD_LIBRARY_PATH}
export LD_LIBRARY_PATH

I've underlined the dodgy signpost.

what happens when you install the arduino service is that it makes a folder in libraries/native that is called armv6.hfp.32.linux...which the library path above doesnt point to. All the resources in armv6.hfp.32.linux are fine, they just need re-filing!

1 copy and rename /library/native/armv6.hfp.32.linux to /library/native/arm.32.linux,

2 check the new folder contains librxtxSerial.so and librxtxSerial-2.2pre1.so

3 and then you will have to re-install the arduino service. I did this by (in MRL) choosing system>update>install latest.

4 Now, check your arduino service can see your usb port and you're having the goodtimes:)