Yay, progress! I'm closing this as fixed since the problem is clearly much reduced, and I'm opening a new bug 83939 for the two issues you mentioned.
** Changed in: linux-source-2.6.20 (Ubuntu) Status: Needs Info => Fix Released -- USB braille display no longer starts with brltty https://launchpad.net/bugs/80892 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs