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Date:      Wed, 12 Jan 2000 08:50:16 -0800
From:      Mike Smith <msmith@freebsd.org>
To:        "Sean O'Connell" <sean@stat.Duke.EDU>
Cc:        stable@FreeBSD.ORG
Subject:   Re: 3.4-RELEASE and ThinkPad 770Z with 256MB memory 
Message-ID:  <200001121650.IAA02361@mass.cdrom.com>
In-Reply-To: Your message of "Wed, 12 Jan 2000 10:25:22 EST." <20000112102522.K6665@stat.Duke.EDU> 

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> On 2000 Jan 12, Eric Hedstrom (aka erich@ucsd.edu) wrote:
> > I think you're right about what the problem is, but the solution will be a
> > little trickier in this case--the 770Z has 128MB built in.
> > 
> 
> What if you interrupt the boot process (hit a spacebar before
> the 10 seconds are up)...
> 
> disk0s4a> set kern.vm.kmem.size=67108864
> 
> where 67108864 = 64*1024*1024.  You could even err on the safe side
> and make it half that or 32MB.
> 
> >From /boot/defaults/loader.conf 
> 
> #kern.vm.kmem.size=""           # Sets the size of kernel memory (bytes)
> 
> Will that help?  This is untried!

One problem is that with > 64MB in the system, the speculative memory 
probing performed by 3.x and older systems tends to kill the Thinkpad 
architecture dead (bad design!).

I don't _think_ that this is the problem, however.  The PnP probe happens 
at a different stage, and I suspect that this is some other, new form of 
brokenness.  It would be very interesting if the original poster were to 
try a 4.0 snapshot on this machine.

Note that I _have_ seen 3.x running on various thinkpad 770s, but not the 
Z.  IBM were never able to ship me one, so I never got to fight with it 
either.

-- 
\\ Give a man a fish, and you feed him for a day. \\  Mike Smith
\\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
\\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com




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