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Date:      Thu, 08 Nov 2001 13:04:44 +0000
From:      "Mark Blackman" <mark.blackman@netscalibur.co.uk>
To:        freebsd-hardware@freebsd.org
Subject:   FreeBSD won't reboot this motherboard.
Message-ID:  <200111081304.NAA77699@mailhost2.dircon.co.uk>

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I've got a GA-6VTXDR-C motherboard with 1GHz pentium and
1Gig of RAM. 

(http://networking.gigabyte.com.tw/Products/Products_ServerBoard_Spec.asp?ProductID=20)

This uses the Via Apollo Pro Family AGP Set 
(North Bridge VT82C694T, South Bridge VT82C686B)

I've been attempting to reboot this machine via the "/sbin/reboot"
executable. In all the cases I've tried, the full shutdown messages
occur, followed by the "Rebooting" output. After putting this line
to the screen, the machine fails to do anything (for 30 seconds and
more). Reboot is then achieved only with a hard reset or power cycle.

I've tried CURRENT (cvsup today) and STABLE (cvsup yesterday) and
they both have this behaviour.

4.4-STABLE-yesterday 
(GENERIC without BROKEN_KEYBOARD_RESET) - hangs after "Rebooting"

4.4-STABLE-yesterday 
(GENERICE with BROKEN_KEYBOARD_RESET)   - hangs after "Rebooting"

5.0-CURRENT-today 
(without BROKEN_KEYBOARD_RESET)         - hangs after "Rebooting"

5.0-CURRENT-today 
(with BROKEN_KEYBOARD_RESET)            - drops into debugger with 
                                          double panic after ~5 sec.

FWIW, Redhat 7.2 does reboot the machine. My reading of the Linux
kernel code suggests that Linux puts the machine into 8086 emulation
mode (real mode) and then calls the BIOS reboot.

I have 3 identical spec. machines which all exhibit this behaviour.

Can anyone suggest any other options for forcing a reboot and what
does this imply about the way this hardware works?

- Mark

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