Yesterday I was in KDE and selected "Halt" from logout menu. The system hung, the last line output was Webmin. With SysRq-T it turned out I had K30usb S modprobe S hotplug S hotplug R I have USB Joystick that is normally always plugged in. I understand it is too little info but it happens just once and I do not know how to reproduce it (it did not happen after next reboot).
