Running latest rawhide. Either if mgetty respawns due to an incoming call or if I just issue "kill -9 PidOfMgetty" the keyboard locks up after a second (mouse works). I can exit the graphical login and restart X to regain keyboard. Not a function of KDE or GNOME as it happens with pure X11 too. mgetty is running on /dev/ttyS0.
Tracked down to SysVinit package.....closing this opening a new one for that.