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Re: kern/46885: NetBSD 6.0_RC1 spontaneously reboots as kernel starts to load

The following reply was made to PR kern/46885; it has been noted by GNATS.

From: Manuel Bouyer <>
Subject: Re: kern/46885: NetBSD 6.0_RC1 spontaneously reboots as kernel
 starts to load
Date: Sat, 1 Sep 2012 23:13:44 +0200

 On Fri, Aug 31, 2012 at 09:05:01PM +0000, wrote:
 >      Problem occurs on a particular desktop system using a standard
 > Intel D865GLC/D865PE50 motherboard, Pentium 4 2.6Ghz processor. System has 
 > been stable for many years and ran NetBSD 5 and was upgraded to NetBSD 6
 > when it was tagged. Regularly updated from source and worked fine with
 > GENERIC kernel.
 > After cvs'ing up to RC1 and building a new GENERIC kernel this would cause
 > the system to reboot just after the kernel loading message, but before the
 > version announcement.
 > Investigation showed that a GENERIC kernel with options DIAGNOSTIC would boot
 > successfully and the problem never showed up before as all NetBSD 6 
 > beta/beta2
 > GENERIC kernels had options DIAGNOSTIC on by default and it was only removed
 > for RC1.
 I can confirm this on a DELL optiplex with a "Intel(R) Celeron(R) CPU 2.80GHz".
 > [...]
 > Compiling a kernel with options DIAGNOSTIC commented out and options DEBUG
 > uncommented and testing that works perfectly as well!
 I looked at low-level code that would have
 #if defined(DIAGNOSTIC) || defined(DEBUG)
 but didn't spot anything (the only file I found in i386 and x86 which
 have something like that is apmcall.S, which is not compiled in).
 Manuel Bouyer <>
      NetBSD: 26 ans d'experience feront toujours la difference

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