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Subject: i386/3124: BOOT_PROBE_KEYBOARD hangs system in bootblocks
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>Number:         3124
>Category:       i386
>Synopsis:       BOOT_PROBE_KEYBOARD hangs system in bootblocks
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 27 11:00:04 PST 1997
>Last-Modified:
>Originator:     Nick Sayer
>Organization:
Just me
>Release:        FreeBSD 2.2-RELEASE i386
>Environment:

Award BIOS, 486, no keyboard

>Description:

If you set BOOT_PROBE_KEYBOARD=true in /etc/make.conf and rebuild and
install the resulting boot blocks, the system will hang on reboot.
If you plug in a keyboard while it is hanging, it will instantly
start booting as if a keyboard was plugged in. The probe is obviously
hanging when no keyboard is present.

Let me be clear.... It is hanging _after_ the boot blocks are loaded
from disk. It is not actually hanging in the bios itself. I know this
because I was testing with a VGA monitor hooked up and watching the
disk light.

>How-To-Repeat:

>Fix:

The workaround is BOOT_FORCE_COMCONSOLE, but that is less desirable,
obviously.

>Audit-Trail:
>Unformatted: