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Date:      Mon, 14 Jan 2013 19:37:22 -0800
From:      Nathan Whitehorn <nwhitehorn@freebsd.org>
To:        freebsd-ppc@freebsd.org, kristof@swissmail.org
Subject:   Re: FreeBSD 9.1 freezes randomly on G5
Message-ID:  <50F4CEF2.6040906@freebsd.org>
In-Reply-To: <50F4BADB.5@swissmail.org>
References:  <50F4BADB.5@swissmail.org>

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On 01/14/13 18:11, Krzysztof Parzyszek wrote:
> Hi,
> 
> I just got a Mac G5 (PowerMac11,2 Dual-core G5 2.0GHz) and I installed
> FreeBSD 9.1 on it (using a 9.1-release iso image).  The problem is that
> the machine freezes at random(?) times, sometimes sooner, sometimes
> later.  Often, the hang can be accelerated by performing I/O operations
> (like copying files).  Sometimes it won't even start booting after the
> OF messages---the screen goes blank and no text is shown.  What "helps"
> it boot is typing 'set hint.acpi.0.disabled="1"', followed by "boot -v",
> although I suspect that this is similar to the "more magic" switch,
> since "sysctl -a" doesn't show any string containing "acpi".
> 
> The box has 16GB of memory.  It passed all ASD tests.
> 
> What happens is that the LED#7 goes on, the machine freezes (without any
> kernel message) and shortly after that the fans go at full power until I
> turn the computer off.
> 
> I have managed to compile subversion (and the machine survived the
> compilations), but then it would repeatedly hang while checking out the
> ports tree.  Actually, it hung enough many times to finally corrupt the
> filesystem causing kernel panic.
> 
> Since it generally works for a while after booting, I can provide more
> information, but I don't know where to look.  This is meant to be a
> "server-like" box, so there are some things that I would consider
> disabling in the kernel, if that would get it to become stable.
> 
> Any input as to what to do next will be appreciated.
> 

Have you tried removing some RAM? I have the same machine, but with 5.5
GB, and it's been my daily-use work desktop under FreeBSD for the last
2.5 years with no trouble.
-Nathan




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