On Friday 25 February 2011 06:14 pm, Jung-uk Kim wrote:
> Author: jkim
> Date: Fri Feb 25 23:14:24 2011
> New Revision: 219046
> URL: http://svn.freebsd.org/changeset/base/219046
>
> Log:
>   Set C1 "I/O then Halt" capability bit for Intel EIST.  Some
> broken BIOSes refuse to load external SSDTs if this bit is unset
> for _PDC.  It seems Linux and OpenSolaris did the same long ago.
>
>   MFC after:  1 week

Please note, however, it only works when cpufreq(4) is loaded with 
acpi(4) because acpi_cpu evaluates _PDC (or _OSC) only once.

FYI, this is an OpenSolaris PR I found:

http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6667515

Jung-uk Kim
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