I've seen references to this issue before, but not with the added info
about needing the mouse to be attached (I added that to the others in
case it may help them at least do some imaging)

Any ideas why a missing mouse (ps2 in these cases) will cause the
keyboard to not be recognized at all during maint imaging? can't even
C-A-D to restart the system. It is obvious this is the issue as
plugging in a mouse and restarting the system, everything works fine.

It is recognizing the keyboard prior to the bash loading, as we do the
Ctrl-Alt to get into the img menu during pxe boot (from disk) and then
select maint mode.

Michael Alexander
Network Administrator
Milwaukee Valve