Hmm, I think comment #21 got it right. hcitool has not been supported for years. Arguably we shouldn't be shipping it. But nobody is going to maintain it as far as I can tell.
** Changed in: bluez (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1870837 Title: hcitool lescan says 'Set scan parameters failed: Input/output error' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1870837/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs