FreeBSD 9.1 freezes randomly on G5

[Justin Hibbits]

Hi,

I actually had the same problem with a nearly identical machine, but less
memory.  I think it may be a bad interrupt controller, and was planning to
tackle interrupt routing for it, as I think MacOSX routes all non-IPI
interrupts to core 0. I do have a 2.3GHz machine of the same family that
runs FreeBSD perfectly, though, so my motivation is lacking right now.

- Justin
On Jan 14, 2013 7:21 PM, "Krzysztof Parzyszek" <kristof at swissmail.org>
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.
>
> -Krzysztof
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