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  From: Jeffrey W. Baker <jwbaker@acm.org>
  To  : <craigm@milkyway.gsfc.nasa.gov>
  Date: Mon, 24 Apr 2000 17:22:27 -0700 (PDT)

Re: apmd not triggering AC online/offline

On Mon, 24 Apr 2000, Craig Markwardt wrote:

> 
> 
> 
> Jeffrey W. Baker writes:
>  > Hi there,
>  > 
>  > I installed apmd 3.0 on a Sony Vaio Z505HS running RedHat 6.1.  I upgraded
>  > the kernel to version 2.2.14.
>  > 
>  > The problem is that apmd is not triggering the "change power" section of
>  > my apmd_proxy script.  All other features work fine, and the
>  > apm(1) program is able to tell me when the machine is and isn't
>  > offline.  /proc/apm is of the correct format.
>  > 
>  > Is this a configuration issue or a bug?  I want this functionality so that
>  > I can pause the disitributed.net client when I am on batteries and fire it
>  > up again when I hook up the line power.
> 
> You can try enabling either of the debugging sections of apmd_proxy,
> to see if the events are at least reaching the script.  My guess is
> they are not.  APMD itself should definitely be passing those along,
> and even logs them.

I did debug it and the events are not reaching the log nor the script.

> It is conceivable that the BIOS just isn't sending those events.
> Which would be wierd since SONY/Phoenix obviously know how to do APM
> already: my 505G works fine.

Yes, and since the kernel is obviously aware that the power has been
removed, I don't think it is a kernel problem.

> 
> The ultimate test is to enable debugging in the kernel module, but
> that requires a recompile.

What do I define to enable that?

> In principle the power change event could be simulated by comparing
> the succesive ac power-on values.  Currently apmd depends on a change
> event from the BIOS.

I'll look into debugging apmd.  I attached gdb to my running apmd ( which
was launched with -p 10 -w 5 -W ), but when I removed the power cord I
didn't hit my breakpoints in apmd_call_proxy and apm_get_events.  I'll
have to spend more time on it.

-jwb