UKBD(4) BSD Kernel Interfaces Manual UKBD(4)
ukbd -- USB keyboard driver
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:
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 fol-
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 key-
board at all, you will have to remove the device atkbd line from the ker-
nel 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
Make the keyboards available through a character device in /dev.
The above lines will put the French ISO keymap in the ukbd driver. You
can specify any keymap in /usr/share/syscons/keymaps with this option.
Do not allow the user to change the keymap. Note that these options also
affect the AT keyboard driver, atkbd(4).
/dev/kbd* blocking device nodes
Add the ukbd driver to the kernel.
kbdcontrol(1), ohci(4), syscons(4), uhci(4), usb(4), config(8)
The ukbd driver was written by Lennart Augustsson
<augustssATcs.se> for NetBSD and was substantially rewritten for
FreeBSD by Kazutaka YOKOTA <yokotaATzodiac.jp>.
This manual page was written by Nick Hibma <n_hibmaATFreeBSD.org> with a
large amount of input from Kazutaka YOKOTA
BSD April 11, 1999 BSD