Date: Wed, 11 Jun 2003 02:24:26 -0700 From: Terry Lambert <tlambert2@mindspring.com> To: Antony T Curtis <antony@abacus.co.uk> Cc: freebsd-current@freebsd.org Subject: Re: Compaq and 5.1-RELEASE Message-ID: <3EE6F54A.127D9187@mindspring.com> References: <200306110847.38319.antony@abacus.co.uk>
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Antony T Curtis wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > 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
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