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:

Best regards,
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