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Date: Wed, 2 Jul 2003 16:30:08 -0700 (PDT)
From: Nate Lawson <nate@root.org>
To: John Baldwin <jhb@FreeBSD.org>
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Subject: RE: Updated ec-burst.diff patch
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On Wed, 2 Jul 2003, John Baldwin wrote:
> On 01-Jul-2003 Nate Lawson wrote:
> > Please download and try the new version.  It correctly implements burst
> > mode to the best of the 2.0 spec.  Like the previous message, please
> > report the appropriate dmesgs ("acpi_ec0*" and "EC Waited*") and any
> > errors or regression.  I've tested "du -a /" while plugging/unplugging the
> > power cable on my laptop many times with no errors.
> >
> > I haven't received any feedback yet.  This WILL hit the tree in a few
> > weeks because it fixes known problems.  Test it now or test it then.  :)
>
> This made my machine a LOT worse.  Previously I would occasionally get
> failed EcRead's do to timeout reading the battery and thermal status after
> the machine had been up for a while, but battery status still worked.
> Setting the event_driven tunable made no difference.  With this patch, the
> EC is very, very broke.  I now get spammed during bootup with a flood of
> failures from EcCommand:
>
> EC Waited max 16 cycles, event occurred
> acpi_ec0: EcCommand: no response to 80, disabling burst mode

It appears your machine does not properly support burst mode.  I suspected
that may be the case, which is what I was checking.  I'll be doing some
more work on the patch and post it again.

>  This has seriously hosed my machine.

Um, you can go back to the old acpi module and I doubt it caused any loss.
Thanks for testing.

-Nate