Re: ACPI power down problem

[Stephan Seidl <stephan.seidl@tu-dresden.de>]

Dear Len,
2.6.17.4 with "maxcpus=1" does not switch off the power (still bad).
2.6.23.9 does switch off the power (works fine).
So I am not sure what should be the next step,
perhaps a simple Debian bug report.
Regards,
Stephan

On Thu, Dec 06, 2007 at 10:51:01PM -0500, Len Brown wrote:
> On Thursday 06 December 2007 20:18, Stephan Seidl wrote:
> > Hi,
> > I would like to ask two questions, but firstly some history.
> > Normally Debian Sarge is running with the kernel 2.6.14.3 with several
> > patches and all works fine since Dec 2005. In Jul, 2006, I tried another
> > kernel, 2.6.17.4, again with several patches, and again all worked fine
> > with the exception of the fact that the machine did not switch off the
> > power on `/sbin/shutdown -t5 -h -P now'. So I rejected the kernel
> > 2.6.17.4 hoping that the problems would disappear by itself with the time.
> > But, it did not.
> > In Aug 2007, Debian 4.0 r1 appeared with a kernel 2.6.18..., still
> > having the power down problem. Obviously, the problem has been introduced
> > between 2.6.14.3 and 2.6.17.4 and I am the only who has it. The concerning
> > board can be described by
> > 
> >   Award Medallion BIOS v6.0, An Energy Star Ally
> >   ASUS P4B ACPI BIOS Revision 1013 Beta 004
> >   Award Plug and Play BIOS Extension v1.0A
> > 
> > This week, to tackle the problem, I addionally applied the patches
> > in the attachment to have the console messages somewhat longer on the screen.
> > I got the same output with the two kernels, 2.6.14.3 and 2.6.17.4, namely
> > 
> >   Power down.
> >   acpi_power_off called
> >    hwsleep-0284 [01] enter_sleep_state     : Entering sleep state [S5]
> > 
> > whereat the line numer 0284 changed to 0283 for 2.6.17.4.
> > What in fact happens after the above has been seen for 20 seconds is that
> > the same machine switches off in case of 2.6.14.3, and wrongly reboots in
> > case of 2.6.17.4. Now the questions, firstly,
> > is that a kernel bug ? From my point of view, yes, it seems to be one.
> > Secondly, if I would more or less stupidly put the debugging into execution,
> > is there anyone who could guide me, because in the ACPI kernel environment,
> 
> yes, it is a bug.
> please try linux-2.6.23.stable and see if it still resets on poweroff there.
> 
> see if there is any difference when you boot with "maxcpus=1".
> 
> cheers,
> -Len
>