ACPI and kernel 2.6.9-1.6.FC2

[Jonathan Berry]

On Fri, 3 Dec 2004 08:12:34 +0800, Wong Kwok-hon <kwokhon at gmail.com> wrote:
> On Thu, 2 Dec 2004 17:36:25 -0600 (CST), Satish Balay <balay at fastmail.fm> wrote:
> > On Fri, 3 Dec 2004, Wong Kwok-hon wrote:
> > > On Thu, 02 Dec 2004 14:15:48 -0500, Efthym <efthym at gmx.net> wrote:
> > > > Hi all,
> > > > I am running FC2 on an IBM T21. I updated from the 2.6.8-1.521 to
> > > > 2.6.9-1.6.FC2 kernel. Now the computer doesn't shutdown and stays at the
> > > > "system halted". This used to work with the 2.6.8. I still haven't tried
> > > > suspending which again used to work fine.
> > > > Has something changed in the new kernel ?
> > > >
> > > Seem that something has changed in 2.6.9 because it is not a problem in 2.6.8
> > > Because I can't poweroff the machine even the faq or other option
> > > sugguested apm=off acpi=off.... etc.
> > >
> > Why use 'apm=off?. I use 'acpi=off' (i.e apm=on) - and no problems
> > with shutdown on a T40/FC3. But things could be different on T21/FC2.
> >
> Sorry, I don't know why and some people tell me it work and one new
> answer to me is acpi=on and hasn't test it work or not...
> 
> I wonder why the above off option works in others but not work in mine....
> 
> Ringo

It's an issue with whatever changes have been made to acpi in the
2.6.9 kernel and *some* hardware from what I can tell.  It obviously
works with some (perhaps newer) hardware, but not with others.  A
workaround is to use "acpi=off" on the kernel grub line, but this is
in no way a fix.  With acpi disabled, another method of turning off
the computer is activated (presumably apm, which is enabled with
disabling acpi) which still works.  I'm running a custom compiled
2.6.8.1 kernel from kernel.org, so I haven't switched over to the new
kernel yet, but booting once and shutting down worked on my Compaq
Presario R3000Z AMD64 laptop.  FC3 with the 2.6.9 kernel does not
power off on my Athlon XP cpu VIA KT400 motherboard desktop, so it's
kind of hit or miss.

Jonathan