$ sudo apt-get remove librxtx-java
$ sudo updatedb
$ locate RXTXcomm.jar
/home/username/bin/arduino-1.0.1/lib/RXTXcomm.jar
/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/RXTXcomm.jar
The first one is accounted for - It's the downloaded Arduino IDE. The
second is of unknown origin:
dpkg --search /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/RXTXcomm.jar
dpkg-query: no path found matching pattern
/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/RXTXcomm.jar.
Googling this path finds *no* results. Is there any other way it could
be related to an installed package? I usually only install software with
apt-get. There's another interesting file in the same directory:
$ cat /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/javax.comm.rxtx.properties
javax.comm.rxtx.SerialPorts=/dev/ttyS0:/dev/ttyS1:/dev/ttyUSB0:/dev/ttyUSB1
Looks like it accounts for why Arduino IDE doesn't list /dev/ttyACM0.
This file is also unknown to dpkg.
Moving these away and reinstalling Arduino strangely does not work:
$ sudo mv /usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/RXTXcomm.jar{,.bak}
$ sudo mv
/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/javax.comm.rxtx.properties{,.bak}
$ sudo apt-get purge arduino
$ sudo apt-get install arduino
$ sudo updatedb
$ locate RXTXcomm.jar
/home/username/bin/arduino-1.0.1/lib/RXTXcomm.jar
/usr/lib/jvm/java-6-openjdk-amd64/jre/lib/ext/RXTXcomm.jar.bak
/usr/share/arduino/lib/RXTXcomm.jar
/usr/share/java/RXTXcomm.jar
$ arduino
Stable Library
=========================================
Native lib Version = RXTX-2.2pre2
Java lib Version = RXTX-2.1-7
WARNING: RXTX Version mismatch
Jar version = RXTX-2.1-7
native lib Version = RXTX-2.2pre2
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https://bugs.launchpad.net/bugs/1054988
Title:
Arduino not detected on USB port
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