Date: Wed, 11 Oct 2006 21:45:35 -0700 From: Nate Lawson <nate@root.org> To: Jacques Garrigue <garrigue@math.nagoya-u.ac.jp> Cc: freebsd-acpi@freebsd.org Subject: Re: Sony Vaio VGN-TX92S Message-ID: <452DC86F.7060102@root.org> In-Reply-To: <20061012.120703.59465247.garrigue@math.nagoya-u.ac.jp> References: <20061010.165404.74754637.garrigue@math.nagoya-u.ac.jp> <20061010.173707.08072970.garrigue@math.nagoya-u.ac.jp> <452BD9D2.5030609@root.org> <20061012.120703.59465247.garrigue@math.nagoya-u.ac.jp>
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Jacques Garrigue wrote:
> From: Nate Lawson <nate@root.org>
>
>>>>> Also, see the acpi man page for cpu idling, namely
>>>>> setting hw.acpi.cpu.cx_lowest=C3.
>>>> I tried this, with only C2, as C3 does not seem to be available for
>>>> this cpu currently. (The Intel docs talk of a "very deep sleep" mode,
>>>> so this may be lacking in the FreeBSD support.)
>>> I was wrong. When I tried first the supported modes were only C1 and
>>> C2, but using sysctl again later I found that C3 and even C4 were
>>> available. I wonder why it changes while running. I tried with C4, but
>>> I get no significant change in temperature.
>> It changes based on AC line status. See the acpi man page or
>> /etc/defaults/rc.conf ("cx" lines) to see.
>
> Thanks. With this I can keep it low.
> But this does not change the original strange behaviour: if I boot
> with AC on, I only get C1 and C2 listed, but if I boot on battery I
> get C1 to C4. The supported modes do not seem to change after boot.
The BIOS decides that. We should get a notify that Cx states changed
and re-evaluate the settings. That support is not done yet so you're
stuck with whatever you get on boot.
>>> Since the main problem is hang-up from overheat, is there any progress
>>> in having powerd slow the CPU when the temperature is too high?
>> Passive cooling is already supported in 6-stable and 7-current.
>
> OK, I've set _PSV to 60.0C, which should have protected me against
> overheat. I verified that the CPU slows when over 60.0C.
> But just as I was writing this mail (and extracting the Linux kernel
> sources, don't ask me why...) I experienced again a strange unexpected
> reboot. Just before reboot, the sysctl node dev.cpu.0 had disappeared!
> The temperature was over 60C, but not that high.
Sounds like a bug or hardware problem.
> By the way, the acpi_thermal man page seems to be wrong about setting
> temperatures through sysctl: it says that you should use an integer
> temperature in celsius, but if I do that I get "Invalid argument".
> Actually I had to set in 1/10 of Kelvin (ie 3332), after reading
> kernel sources.
I think you need a "C" to indicate celsius. Example: ="60C"
The sysctl user program translates for Celsius, Fahrenheit ("120F"), and
Kelvin (no letter).
--
Nate
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