RPI2 ttyACM and Java

[tFlolo]

Hello

I am running oracle java jdk-8 with java-rxtx library (from repo) and connecting via java to an Arduino mega 2560. This works fine and i have had no problems doing this. The user running the software is member of uucp and lock groups and it works fine.

When I did a system upgrade (pacman -Syu) I get noSuchPortException from my java application.

I can access /dev/ttyACM0 with avrdude or cat /dev/ttyACM0 (from the same user) but my Java application can no longer see the device for some reason.

Any ideas?

To fix this i downgrade my arch linux from a mirror dated back to 2015/12/01 all I have to do to fix the problem is set the mirror and do a -Syyuu then reboot and im good to go.

To reproduce i use the offical mirror and do a system upgrade.

Any tips?

--
Thomas