svn commit: r219046 - head/sys/x86/cpufreq
jkim at FreeBSD.org
Fri Feb 25 23:32:06 UTC 2011
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
> 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:
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