From owner-freebsd-acpi@FreeBSD.ORG  Wed Nov  9 04:39:38 2005
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Date: Tue, 08 Nov 2005 21:38:04 -0700 (MST)
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To: acpi@freebsd.org
From: "M. Warner Losh" <imp@bsdimp.com>
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Subject: acpi_perf
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A long time ago I disabled acpi_perf because it was causing a double
free panic.  I'd forgotten that I'd done this until recently when I
noticed in the /boot/loader.conf file.  I renabled it and now I see:

cpu0: <ACPI CPU> on acpi0
acpi_perf0: <ACPI CPU Frequency Control> on cpu0
acpi_perf0: failed in PERF_STATUS attach
device_attach: acpi_perf0 attach returned 6
acpi_perf0: <ACPI CPU Frequency Control> on cpu0
acpi_perf0: failed in PERF_STATUS attach
device_attach: acpi_perf0 attach returned 6
acpi_throttle0: <ACPI CPU Throttling> on cpu0
acpi_lid0: <Control Method Lid Switch> on acpi0

I don't know if this happened before or not, but I was wondering what
people think the next step would be.

Warner