I've try ubuntu 10.04 32 bits installation and it was all OK.
But when I decided to install on an 64 bits platform problems arise.
It seems that librxtx.so in not the corret type.
This is the error Mango repots
"/usr/lib/jvm/java-6-sun-1.6.0.22/jre/lib/amd64/librxtxSerial.so: /usr/lib/jvm/java-6-sun-1.6.0.22/jre/lib/amd64/librxtxSerial.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)"
Where can I download the correct library for my OS Ubuntu 9.10 64 bits????
Download the following files to the given directories. RXTXcomm.jar is required for all host types. Note that the Linux library is for x86 hosts only. For other host types, please see rxtx.org.
That's the problem.
I could see that the directory i386 is missing from my installation. In my case the directory is amd64.
I'll see if I can compile sources from rxtx.org.
Thanks and BR.
Gustavo