Re: 5.0beta won't boot on a Dell Dimension 8400

[Andrew Doran <ad%netbsd.org@localhost>]

On Mon, Dec 01, 2008 at 11:01:45PM -0500, Steven M. Bellovin wrote:

> On Sun, 30 Nov 2008 09:50:04 +0000
> Andrew Doran <ad%netbsd.org@localhost> wrote:
> 
> > On Sat, Nov 29, 2008 at 03:59:06PM -0500, Steven M. Bellovin wrote:
> > 
> > > NStopped in pid 0.2 (system) at  netbsd:sse2_idlezero_page+0x18: jnz
> > > netbsd:sse2_idlezero_page+0x46
> > > 
> > > Is there some kernel option or patch I could try to make the kernel
> > > go to the backtrace function immediately?  
> > 
> > Look for this line in arch/i386/i386/trap.c:
> > 
> >     printf ("NMI ... going to debugger\n");
> > 
> > Please change it to:
> > 
> >     printf ("NMI ... going to debugger cr4=%lx\n", (long)rcr4());
> > 
> > It may be that SSE is not enabled for some reason.
> > 
> cr4=690
> 
> Btw -- both machines have the same BIOS version, A03 from 2004.  A09 is
> available; it's about two years newer.  I wonder if installing it would
> make life better or worse...

SSE is enabled. If it were my machine the next thing I would try updating
the BIOS and then perhaps compare output of DEBUG_MEMLOAD between the
machines, and maybe disable load of some segments.

Andrew