ACPI Exception AE_BAD_ADDRESS in Lenovo ThinkPad S440

[Juan Ramón Molina Menor]

Le 20/07/2015 05:48, Kevin Oberman a écrit :
> On Sun, Jul 19, 2015 at 2:54 AM, Juan Ramón Molina Menor
> <listjm at club-internet.fr <mailto: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.

Thanks Kevin. Could you please give me a hint for silencing these 
errors? They are making very hard to use the installer or live USB for 
testing purposes. I guess the BIOS will take care of thermal and fan 
control.

> Brightness is finally working on most or all. Thermal should show up in
> hw.acpi and dev.cpu.

Brightness levels are correctly shown (1-100) after loading the 
acpi_video kernel module, but I cannot change them. Maybe it’s the 
Haswell chip not responding. I’m going to try CURRENT.

Thermal hw.acpi sysctls show bogus values, but dev.cpu works after 
loading the coretemp kernel module.

Best regards,
Juan

>
> 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 <mailto:rkoberman at gmail.com>
> PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683