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Date: Sun, 28 Jan 2007 20:11:55 +0100
From: Lars Stokholm <lars.stokholm@gmail.com>
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To: Roland Smith <rsmith@xs4all.nl>
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Cc: freebsd-stable@freebsd.org
Subject: Re: rd.d/power_profile: dev.cpu.0.cx_supported doesn't exist
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Roland Smith wrote:
> On Sun, Jan 28, 2007 at 07:26:00PM +0100, Lars Stokholm wrote:
>> hw.acpi.cpu.cx_lowest: C1
>> sysctl: hw.acpi.cpu.cx_lowest: Invalid argument
> 
> Works fine here:
> 
> # sysctl hw.acpi.cpu.cx_lowest=C1/0
> hw.acpi.cpu.cx_lowest: C1 -> C1

# sysctl hw.acpi.cpu.cx_lowest=C1/0
hw.acpi.cpu.cx_lowest: C1
sysctl: hw.acpi.cpu.cx_lowest: Invalid argument

# sysctl hw.acpi.cpu.cx_lowest=C1
hw.acpi.cpu.cx_lowest: C1
sysctl: hw.acpi.cpu.cx_lowest: Invalid argument

>> So, finally, the question now is why I get the "invalid argument".
> 
> The only thing I can think of is that you've defined
> performance_cx_lowest or economy_cx_lowest to some bogus value in rc.conf.

Nope, I haven't touched anything like that. In fact this is a fairly 
clean install of FreeBSD. I haven't messed a lot around with anything. 
In /etc/defaults/rc.conf they're:

performance_cx_lowest="HIGH"    # Online CPU idle state
economy_cx_lowest="HIGH"        # Offline CPU idle state