I've been hit by this problem too. Even though answers found through Google suggested a complete removal of brltty, I dig deeper. Finally I narrowed down the problem to one of the udev rule, specifically tailored for an otherwise generic 0403:6001 Vendor/Product combination. After commenting it out, my USB->Serial adapter worked flawlessly.
Additional info: * Bug #122834 - FTDI USB Serial Device converter disconnects The conclusion is that udev rules should be changed. So, awaiting the action from maintainers... A simple, one-liner removal. Please! -- Arduino detected as braille device https://bugs.launchpad.net/bugs/84139 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
