Nicolas, you are not meant to run cu as root. Does it work if you run cu as a normal user and this user is member of the dialout group?
-- Serial port devices (ttyS*) unaccessible from non-root accounts https://bugs.launchpad.net/bugs/255200 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs