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From: j@uriah.heep.sax.de (J Wunsch)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: APM on thinkpad 755
Date: 17 Aug 1996 11:56:14 GMT
Organization: Private BSD site, Dresden
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References: <32124744.4759@browncow.com>
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Bill Kish <kish@browncow.com> wrote:
> I've got FreeBSD 2.1.0-RELEASE installed on my ThinkPad 755.
> The kernel panics with a write (page not present) page fault when APM
> is configured and apm code is executed. I believe that this is a
> known problem.
I don't think it's already fixed. I remember a discussion on the
-hackers list recently about the following part of
/sys/i386/i386/machdep.c:
/*
* Print a warning if the official BIOS interface disagrees
* with the hackish interface used above. Eventually only
* the official interface should be used.
*/
if (bootinfo.bi_memsizes_valid) {
if (bootinfo.bi_basemem != biosbasemem)
printf("BIOS basemem (%ldK) != RTC basemem (%dK)\n",
bootinfo.bi_basemem, biosbasemem);
if (bootinfo.bi_extmem != biosextmem)
printf("BIOS extmem (%ldK) != RTC extmem (%dK)\n",
bootinfo.bi_extmem, biosextmem);
}
I think it was found that using the RTC value is wrong for APM
machines. Try this (after the above lines), and see if it will help
you:
biosbasemem = bootinfo.bi_basemem;
--
cheers, J"org
joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)