Christos Zoulas <christos@netbsd.org> typed:
: Modified Files:
: 	src/sys/kern: tty.c
: Log Message:
: Allow F{G,S}OWN to succeed on a tty that has no session associated with it,
: and it is not the controlling tty. This change allows us to use SIGIO on
: a non-controlling tty (eg. debug ntpd with a refclock on a tty).

This has killed my com port mouse under XFree 4.5.0 (i386).  Previously
with a working mouse /var/log/XFree86.0.log would have
  (WW) fcntl(6, F_SETOWN): Inappropriate ioctl for device

Anything obvious to anyone else?  (before I have to kickstart my brain)

Regards,
Geoff