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     ukbd — USB keyboard driver


     To compile this driver into the kernel, place the following line in your kernel
     configuration file:

           device ukbd

     Alternatively, to load the driver as a module at boot time, place the following line in



     The ukbd driver provides support for keyboards that attach to the USB port.  usb(4) and one
     of uhci(4) or ohci(4) must be configured in the kernel as well.


     By default, the keyboard subsystem does not create the appropriate devices yet.  Make sure
     you reconfigure your kernel with the following option in the kernel config file:

           options KBD_INSTALL_CDEV

     If both an AT keyboard USB keyboards are used at the same time, the AT keyboard will appear
     as kbd0 in /dev.  The USB keyboards will be kbd1, kbd2, etc.  You can see some information
     about the keyboard with the following command:

           kbdcontrol -i < /dev/kbd1

     or load a keymap with

           kbdcontrol -l keymaps/pt.iso < /dev/kbd1

     See kbdcontrol(1) for more possible options.

     You can swap console keyboards by using the command

           kbdcontrol -k /dev/kbd1

     From this point on, the first USB keyboard will be the keyboard to be used by the console.

     If you want to use a USB keyboard as your default and not use an AT keyboard at all, you
     will have to remove the device atkbd line from the kernel configuration file.  Because of
     the device initialization order, the USB keyboard will be detected after the console driver
     initializes itself and you have to explicitly tell the console driver to use the existence
     of the USB keyboard.  This can be done in one of the following two ways.

     Run the following command as a part of system initialization:

           kbdcontrol -k /dev/kbd0 < /dev/ttyv0 > /dev/null

     (Note that as the USB keyboard is the only keyboard, it is accessed as /dev/kbd0) or
     otherwise tell the console driver to periodically look for a keyboard by setting a flag in
     the kernel configuration file:

           device sc0 at isa? flags 0x100

     With the above flag, the console driver will try to detect any keyboard in the system if it
     did not detect one while it was initialized at boot time.


           options KBD_INSTALL_CDEV

     Make the keyboards available through a character device in /dev.

           options UKBD_DFLT_KEYMAP
           makeoptions UKBD_DFLT_KEYMAP=fr.iso

     The above lines will put the French ISO keymap in the ukbd driver.  You can specify any
     keymap in /usr/share/syscons/keymaps or /usr/share/vt/keymaps (depending on the console
     driver being used) with this option.


     Do not allow the user to change the keymap.  Note that these options also affect the AT
     keyboard driver, atkbd(4).


     The following variables are available as both sysctl(8) variables and loader(8) tunables:

             Debug output level, where 0 is debugging disabled and larger values increase debug
             message verbosity.  Default is 0.


     /dev/kbd*  blocking device nodes


           device ukbd

     Add the ukbd driver to the kernel.


     kbdcontrol(1), ohci(4), syscons(4), uhci(4), usb(4), vt(4), config(8)


     The ukbd driver was written by Lennart Augustsson <> for NetBSD and
     was substantially rewritten for FreeBSD by Kazutaka YOKOTA

     This manual page was written by Nick Hibma <> with a large amount of
     input from Kazutaka YOKOTA <>.