ACPI Exception AE_BAD_ADDRESS in Lenovo ThinkPad S440

[Kevin Oberman]

On Sun, Jul 19, 2015 at 2:54 AM, Juan Ramón Molina Menor <
listjm at club-internet.fr> wrote:

> Hello.
>
> I’ve just got a Lenovo ThinkPad S440 and would like to test FreeBSD
> 10.2-BETA2 on it. I’ve tried with the UEFI memstick image
> (FreeBSD-10.2-BETA2-amd64-uefi-mini-memstick.img.xz). Unfortunately,
> shortly after the installer starts, the screen fills with errors related to
> ACPI thermal zones:
>
> ACPI Exception: AE_BAD_ADDRESS, Returned by Handler for [EmbeddedControl]
> (20150515/evregion-312) S (20150515/psparse-552)
>
> I have tested some features of the acpi_ibm, some do not work: fan
> control, for example, but I’m not sure I’m doing it right and this is an
> issue for later.
>
> I’ve created a PR with the information asked for in the ACPI chapter of
> the handbook:
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=201678
>
> Best regards,
> Juan
> _______________________________________________
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>

IIRC, fan control has not worked since the days of the T61. Newer BIOS end
EC don't seem to work. The "ACPI Exception: AE_BAD_ADDRESS" has shown up on
various systems for a while.It's reportedly harmless. Brightness is finally
working on most or all. Thermal should show up in hw.acpi and dev.cpu.

I don't have any experience on S series systems, only X and T, but I
suspect the ACPI is similar.
--
Kevin Oberman, Network Engineer, Retired
E-mail: rkoberman at gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683