misc/60646: VIA C3 system hangs on reboot

[David Xu]

ctodd at chrismiller.com wrote:

>The following reply was made to PR misc/60646; it has been noted by GNATS.
>
>From: ctodd at chrismiller.com
>To: David Xu <davidxu at freebsd.org>
>Cc: Chris Miller <admin at forkthepenguin.com>,
>	freebsd-gnats-submit at freebsd.org
>Subject: Re: misc/60646: VIA C3 system hangs on reboot
>Date: Thu, 1 Jan 2004 22:05:06 -0800 (PST)
>
> On Fri, 2 Jan 2004, David Xu wrote:
> 
> > I have a VIA EPIA-M II board in hand, its chipset is VIA CLE266, runs
> > just fine, no the reboot problem you reported, I think it is not CPU
> > related, but chipsets or motherboard related, I saw your motherboard is
> > using SIS's chipsets...
> 
> I recently spoke with someone with a VIA motherboard that said the same
> thing. The motherboard in question is an ECS (http://ecsusa.com) P6VEM3
> V3. When "Rebooting" is printed to the screen, I do see a flash as if a
> signal is sent to reboot but perhaps is not long enough in duration. Any
> ideas as to where to look for a cause/solution/workaround in the
> source code? Perhaps I can experiment a bit. The manufacturer is
> non-responsive to support requests through their website....
>  
>
I think the lastest code kernel executes before CPU reboots
itself is in /sys/i386/vm_machdep.c  function cpu_reset_real().
try to increase DELAY value to see if there is any differences,
or just disable it by define BROKEN_KEYBOARD_RESET in your
kernel config file and force CPU to go into triple faults and
reboot itself.

> 
> Chris
> 
>  
>