DragonFly BSD
DragonFly kernel List (threaded) for 2003-11
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Re: Can anyone explain this?

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Sun, 16 Nov 2003 15:14:09 -0800 (PST)

:I have a dual P3 VIA motherboard (from Gigabyte) that I'm currently
:running multiple operating systems from: Slackware 9.1, NetBSD -CURRENT,
:DragonFlyBSD, BeOS, Windows XP, and Syllable.
:Of those six, any time I reboot from DragonFlyBSD, I get the following
:message from the computer when it POSTs.
:"CMOS/GPNV Checksum Bad"
:When I first noticed this pattern, I chalked it up to coincidence, and
:just reset the CMOS to it's default values with F2 and kept going.
:However, I'm beginning to doubt this is a coicidence any more.  I have
:spent all weekend rebooting between operating systems, with different
:hardware configuration nearly every time, and this *only* happens when I
:reboot from DragonFly. 
:Does this make any sense?  Could the OS be screwing up my CMOS?

    Yes, it is screwing up the CMOS.  Several people have reported this,
    but so far nobody has been able to track it down.  I don't have a
    system that does this so I haven't been able to track it down either.

    Would you like to try to track it down?  It involves throwing an endless
    loop into the low level boot code to lock the machine up and then hitting
    reset, then moving the loop to zero in on which part of our codebase is
    corrupting the CMOS.

					Matthew Dillon 

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