Re: [PATCH] Add CONFIG_ACPI_RELAXED_AML option

[NoZizzing OrDripping <nozizzingordripping-/E1597aS9LQAvxtiuMwx3w@public.gmane.org>]

--- Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org> wrote:
> Hi!
> > What is really being proposed here is for Linux
> ACPI to be bug-for-bug
> > compatible with Microsoft.  This is impossible to
> do deterministically
> > because the MS interpreter is closed source.  The
> only standard that we have
> > that we can code to is the ACPI specification, and
> this has to be the last
> > word on the matter.
> 
> Okay, but we can try. We can for example ignore
> '*PNP101' and
> understand it as 'PNP101', with printk("Star is not
> valid character in
> device name"), which is way more helpufull than
> /proc/battery does not
> exist.
> 
> I believe CONFIG_ACPI_RELAXED_AML is good idea.
> 								Pavel

The opinions on this are going to break down along the
lines of who has working AML, and who doesn't, with
the tie-breaker going to the distro that wants to
have as many satisfied "customers" as possible.  Right
now, that distro is XP :-(

Anyway, I did a tightened up CONFIG_RELAXED_AML_PATCH
that restricts the slopiness along the lines that Alan
suggested, and also outputs a one-time warning for
any region access violation.

However, a more general implementation would provide
either a global nagged_already bit, or better yet
a per-object nagged_already bit. Or for the most
pedantic, per-object and per-violation-type
nagged_already bits.

Its nasty ugliness, no doubt, but I think that while
strict conformance to standards is a lofty goal, a
loftier goal is for mere mortals to be able to
install Linux on the most popular laptops.

BTW, Best Buy had the Toshiba Satellite 1115-S103 on
sale for only $500 USD yesterday (after $600 in
rebates and markdowns!).  The new bar has been set,
and these
sub-$1000 laptops with buggy AML are going to continue
to profilerate.

If we could agree to add the mechanism, then people
could contribute additional workarounds. It would
still be a controllable feature, turned on only if
desired.

-Rick
rickr-EySxSuIQeMUAvxtiuMwx3w@public.gmane.org


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