ukbd — USB keyboard driver

       The ukbd  driver  was  written  by  Lennart  Augustsson  <augustss@cs.chalmers.se>  for  NetBSD  and  was
       substantially rewritten for FreeBSD by Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>.

       This  manual  page  was  written  by  Nick  Hibma <n_hibma@FreeBSD.org> with a large amount of input from
       Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>.

Debian                                           April 24, 2018                                          UKBD(4)

       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:

             optionsKBD_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-lkeymaps/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  deviceatkbd 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:

             devicesc0atisa?flags0x100

       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.

       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.

optionsKBD_INSTALL_CDEV

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

             optionsUKBD_DFLT_KEYMAPmakeoptionsUKBD_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.

             optionsKBD_DISABLE_KEYMAP_LOADING

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

deviceukbd

       Add the ukbd driver to the kernel.

/dev/kbd*  blocking device nodes

       ukbd — USB keyboard driver

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

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

             deviceukbd

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             ukbd_load="YES"

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

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