In early booting stage before /boot/loader is loaded, your USB
keyboard is driven by BIOS, emulating a PS/2 keyboard. Once kernel has
initialized USB keyboard, BIOS will not handle USB keyboard any longer.
As far as I know, /boot/loader has been working in protected mode,
but lacking of support for USB.
------------------------------------------------------------------------
From Beijing, China
Bryan Liesner wrote:
I recently replaced my PS/2 keyboard with a USB keyboard. Works great,
but with one exception. If the system is rebooted, it's easy enough to
get into the BIOS settings, but after the boot process starts, the
keyboard is dead until the kernel is loaded. So hitting the space bar to
get to a loader prompt to boot kernel.old or perhaps putting in a boot -v
was impossible.
I poked around on the mailing lists and saw that some others were having
the same issue, with no real answers.
On a lark, I decided to try GRUB. Replacing the BSD boot blocks with GRUB
resolved this issue for me. Now, when the system starts, I don't lose the
keyboard and can hit the space bar when the loader starts to get to a
prompt.
This brings up an interesting question, probably for another list. What
are the FreeBSD boot blocks doing (or not doing) that cause the loss of
legacy USB support?
-Bryan
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