Re: Compaq and 5.1-RELEASE

Antony T Curtis wrote:
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> I'm trying to install 5.1-R onto a Compaq Amarda V300 series laptop.
> If I allow ACPI to be loaded, it hangs pretty quick right after trying to
> mount the memory disk.
> 
> However, in safe mode, it works until during the unpacking/installing, I get a
> 
> Fatal trap 12: page fault while in kernel mode
> fault virtual address   = 0x1c
> fault code              = supervisor write, page not present

This is a dead giveaway that soemone is dereferencing a NULL
pointer looking for a structure member at offset 28 decimal.

If it were a much larger number, it would mean that someone
was getting a page not present error on a real address, one
that had been mapped and no longer was, or one as a result
of a processor bug.

In general, this is most likely a real bug.

Maybe someone with access to the build machine with a symboled
kernel can tell you what lives at 0x8:0xc02fb3c5 (the instruction
pointer at the time of the fault), which would tell you (well,
tell *them*) where the problem is, so that they could fix it,
or give you some type of workaround.

-- Terry