Marco, thank you for your report and all the information you provided. As the issue was fixed after installing OpenJDK 8 and I have been unable to reproduce it, I will be closing this.
** Changed in: openjdk-9 (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579781 Title: librxtx-java fails to open /dev/ttyACM0 port! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openjdk-9/+bug/1579781/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs