Date: Thu, 11 Oct 2007 11:35:34 +1000 From: Norberto Meijome <freebsd@meijome.net> To: Ian Smith <smithi@nimnet.asn.au> Cc: FreeBSD Mobile ML <freebsd-mobile@freebsd.org> Subject: Re: Management of Thermal Message-ID: <20071011113534.62d01980@meijome.net> In-Reply-To: <Pine.BSF.3.96.1071008235055.1617A-100000@gaia.nimnet.asn.au> References: <20071008173604.1e449ca2@meijome.net> <Pine.BSF.3.96.1071008235055.1617A-100000@gaia.nimnet.asn.au>
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On Tue, 9 Oct 2007 03:21:20 +1000 (EST)
Ian Smith <smithi@nimnet.asn.au> wrote:
> > > ### trying to finetune the action of the thermal zones
> > > ## man 4 acpi_thermal
> > > ## for details
> > > ## Defaults:
> > > #hw.acpi.thermal.min_runtime: 0
> > > #hw.acpi.thermal.polling_rate: 10
> > > #hw.acpi.thermal.user_override: 0
> > > #hw.acpi.thermal.tz0.temperature: 91.0C
> > > #hw.acpi.thermal.tz0.active: -1
> > > #hw.acpi.thermal.tz0.passive_cooling: 0
>
> Mine's always 1, man says default on - is this your current setting?
>
> > > #hw.acpi.thermal.tz0.thermal_flags: 0
> > > #hw.acpi.thermal.tz0._PSV: 94.5C
> > > #hw.acpi.thermal.tz0._HOT: -1
> > > #hw.acpi.thermal.tz0._CRT: 99.0C
> > > #hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
> > > ## Custom values
> > > hw.acpi.thermal.user_override=1
> > > hw.acpi.thermal.min_runtime=10
> > > hw.acpi.thermal.polling_rate=5
> > > hw.acpi.thermal.tz0.active=85C
> > > hw.acpi.thermal.tz0._PSV=90C
>
> Just curious re syntax - do these values read back right after setting?
> And if you're overriding, is that the right setting for .tz0.active ?
> but I'm well out of my depth here ..
>
> > > Any help / pointers would be greatly appreciated...
>
> The info on tzs and fan settings from acpi_ibm might have clues?
Hey mate,
i had another try with Mrs hw.acpi* .... no luck....
this are my current relevant lines in /etc/sysctl.conf :
## Custom values
hw.acpi.thermal.user_override=1
hw.acpi.thermal.min_runtime=25
hw.acpi.thermal.polling_rate=5
hw.acpi.thermal.tz0._ACx=90 85 80 75 70 75 60 65 60 55
My intention is to :
1) let me override defaults
2) run fans for 25 seconds for each state change (just to make sure i do hear
them :D )
3) check the temperature every 5 seconds
The first 3 apply fine.
4) Set the temperatures at which to change the fan speed. I used temperature
values in decreasing order because man acpi_thermal says :"The lower the _ACx
value, the higher the cooling power."
Alas, even in the startup process, _ACx cannot be set, it says it's a RO knob.
Something interesting, from the man page
hw.acpi.thermal.tz%d.active
Current active cooling system state. If this is non-negative,
the appropriate _AC%d object is running. Set this value to the
desired active cooling level to force the corresponding fan
object to the appropriate level.
The value for _ACx shows 10 "-1":
hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
when trying to set the value for tz0.active , only values from -1 to 9 will not
fail. They don't get saved either, they are always reset to -1, but there is no
error:
[betom@ayiin] [Thu Oct 11 11:29:31 2007]
/usr/home/betom
$ sudo sysctl -a hw.acpi.thermal.tz0.active=-3
hw.acpi.thermal.tz0.active: -1
sysctl: hw.acpi.thermal.tz0.active: Invalid argument
[betom@ayiin] [Thu Oct 11 11:29:33 2007]
/usr/home/betom
$ sudo sysctl -a hw.acpi.thermal.tz0.active=-2
hw.acpi.thermal.tz0.active: -1
sysctl: hw.acpi.thermal.tz0.active: Invalid argument
[betom@ayiin] [Thu Oct 11 11:29:36 2007]
/usr/home/betom
$ sudo sysctl -a hw.acpi.thermal.tz0.active=9
hw.acpi.thermal.tz0.active: -1 -> -1
[betom@ayiin] [Thu Oct 11 11:29:39 2007]
/usr/home/betom
$ sudo sysctl -a hw.acpi.thermal.tz0.active=10
hw.acpi.thermal.tz0.active: -1
sysctl: hw.acpi.thermal.tz0.active: Invalid argument
So something seems to be recognising there are 10 levels of fan speeds, and
linking it to tz0.active, but it fails after that.
Also, when trying to set _ACx, i went to dig into the boot loader's cmds...just
to see if I could see anything interesting there ( I didnt ;) ). Anyway, while
I was browsing through the variables, the fan actually powered up! acpi_ibm was
already loaded of course...but i suspect that was a bios thing kicking in... It
slowed down again to its usual extremely quite 2.7 <->3.2 K rpms sometime
during the boot process.
I'll see if I can find anything useful in -acpi@...
cheers,
B
_________________________
{Beto|Norberto|Numard} Meijome
"Religion is what the common people see as true, the wise see as false, and the
rulers see as useful." Seneca
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