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Date:      Mon, 12 Nov 2001 11:19:02 +0000
From:      Mark Blackman <mark.blackman@netscalibur.co.uk>
To:        freebsd-hardware@freebsd.org
Cc:        grog@lemis.com
Subject:   Megaraid Express interferes with reboot
Message-ID:  <20011112111902.A82212@admin4.dircon.net>
In-Reply-To: <200111081304.NAA77699@mailhost2.dircon.co.uk>; from mark.blackman@netscalibur.co.uk on Thu, Nov 08, 2001 at 01:04:44PM %2B0000
References:  <200111081304.NAA77699@mailhost2.dircon.co.uk>

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For anyone who is interested. This is actually
caused by the presence of a Megaraid Express 500 [475]
adapter. Removing the adapter allows the system
to reboot normally.

I've got no idea how the Megaraid Express 500 gets in
the way though. Any ideas?

Regards,
Mark

On Thu, Nov 08, 2001 at 01:04:44PM +0000, Mark Blackman wrote:
> 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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