I've been trying to someone on the list with acpi related shutdown
problems, with no success up to now.

When I had shutdown problems with FC5 (fixed with using acpi=force), someone
on the Fedora list suggested that it could be a problem with SMP kernels.

I Googled a bit the other day, and found stuff about recompiling the kernel,
and disabling SMP in it, but is there a way to disable SMP by appending the
kernel line in GRUB?

I read one comment that said:
To disable SMP at bootup, use,
noreplace-smp

Is that an appendment to the kernel line or what? I don't want to suggest
something stupid for Mark to try.

Any comments, suggestions welcome.

Nigel.


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On Mon, 20 Aug 2007, Nigel Henry wrote:

> I've been trying to someone on the list with acpi related shutdown
> problems, with no success up to now.
>
> When I had shutdown problems with FC5 (fixed with using acpi=force), someone
> on the Fedora list suggested that it could be a problem with SMP kernels.
>
> I Googled a bit the other day, and found stuff about recompiling the kernel,
> and disabling SMP in it, but is there a way to disable SMP by appending the
> kernel line in GRUB?
>
> I read one comment that said:
> To disable SMP at bootup, use,
> noreplace-smp
>
> Is that an appendment to the kernel line or what? I don't want to suggest
> something stupid for Mark to try.
>
> Any comments, suggestions welcome.
>
> Nigel.
>

Yes, you would want to append that to the kernel line in
/boot/grub/menu.lst . You may also want to try nosmp or maxcpus=0 , both
of those will disable the smp code.

-+-
8 out of 10 Owners who Expressed a Preference said Their Cats Preferred Techno.


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On Monday 20 August 2007 19:24, Jeff D wrote:
> On Mon, 20 Aug 2007, Nigel Henry wrote:
> > I've been trying to someone on the list with acpi related shutdown
> > problems, with no success up to now.
> >
> > When I had shutdown problems with FC5 (fixed with using acpi=force),
> > someone on the Fedora list suggested that it could be a problem with SMP
> > kernels.
> >
> > I Googled a bit the other day, and found stuff about recompiling the
> > kernel, and disabling SMP in it, but is there a way to disable SMP by
> > appending the kernel line in GRUB?
> >
> > I read one comment that said:
> > To disable SMP at bootup, use,
> > noreplace-smp
> >
> > Is that an appendment to the kernel line or what? I don't want to suggest
> > something stupid for Mark to try.
> >
> > Any comments, suggestions welcome.
> >
> > Nigel.
>
> Yes, you would want to append that to the kernel line in
> /boot/grub/menu.lst . You may also want to try nosmp or maxcpus=0 , both
> of those will disable the smp code.

Thanks Jeff for the quick response. All suggestions written down on hard copy
for future reference.

These acpi related shutdown problems are a real nightmare to resolve. Not
everyone is affected. it just seems to happen on some hardware, and later
kernels.

for example on one of my 2 machines, an old Gateway 500, P111 (katmai), Fc5
shutsdown completely whichever kernel I've booted up with. On a later
I-friend machine, FC5 will shutdown completely if I boot with the original
2.6.15 kernel, but booting with revisions of the 2.6.17 kernel, and later, I
have to add acpi=force to the kernel line to get it to shutdown completely.

My Debian Etch, and Lenny installs on the I-friend machine are using a 2.6.17
kernel, but may be an earlier revision than the FC5 one, and I don't have any
shutdown problems with my Debian installs. I'll try and find later kernels
for Etch, and Lenny to see if the shutdown problem shows up.

Mind you, saying this, a bug report for Ubuntu to Launchpad showed acpi
related shutdown problems with 2.6.15 kernels. Many suggestions to append the
kernel line with, some worked, others didn't. It's all a bit bizarre.

Thanks again for your .

Nigel.


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