Date: Sat, 21 Dec 2013 18:01:35 -0500 From: ito <egunther@warwick.net> To: Ian Smith <smithi@nimnet.asn.au> Cc: freebsd-acpi@freebsd.org Subject: Re: loud fan pavilion ze2000 Message-ID: <1387666895.5356.22.camel@res-cmts> In-Reply-To: <20131221152703.E25305@sola.nimnet.asn.au> References: <1387551635.2533.21.camel@res-cmts> <20131221152703.E25305@sola.nimnet.asn.au>
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Hello Ian,
At 50 through 62C the dev.cpu.0.freq: 1298
at 70C , 1135
back up to 1298
dev.cpu.0.freq_levels: 1298/-1 1298/-1 973/-1 811/-1
649/-1 486/-1 324/-1 162/-1
Also directly below that:
dev.p4tcc.0.freq_settings: 10000/-1 8750/-1 7500/-1 6250/-1 5000/-1
3750/-1 2500/-1 1250/-1
I suppose that is the 8 (freq_levels) you where referring to. Further I
infer that this -1 means that the BIOS has set them or does set them.
I set hw.acpi.thermal.tz0._PSV: 70C
Trying "find / acpi" to see it work.
While doing the above (find) the fan is on but not full out.
I am reluctant to type anything like dd: anything: I'm not really that
confident with the command line.
After setting the PSV value it does not go above 71 when rendering
animation with blender.
I will try cleaning it again, but I think I remember that I thought
cleaning would fix it before.
I looked at acpi_thermal, have to digest it.
Found the source online for freebsd acpi.
So I guess that I could adjust the throttling, through the process that
the machine uses to save power??
As far as what the system does, so far the only thing that I noticed is,
in TOP;
acpi_cooling0 cooling
acpi_thermal tz0poll
intr changing
pagezero pagezero
and system idle percentage change.
Thanks,
eg
PS, is this the exact command?
" dd if=/dev/random > of=/dev/null "
On Sat, 2013-12-21 at 16:13 +1100, Ian Smith wrote:
> On Fri, 20 Dec 2013 10:00:35 -0500, ito wrote:
> > Hi,
> >
> > I posted a question to the freebsd forums (under mobile computing) in
> > which I was seeking help with a old laptop (hp pavilion ze2000) because
> > of fan noise. The problem is not really that the fan is too loud,
> > although that is part of it, it is that it cycles frequently (about
> > every 21 sec, at average use). I seems to me now that maybe here would
> > be more appropriate.
> > I am having trouble finding information about the acpi functions in
> > particular. So I thought maybe I could get help here. For instance,
> > according to the information below, is the passive cooling set to start
> > at 85.0C (Celsius) which would be 185 Fahrenheit? Is this very hot to
> > start to cool down passively? Why is active cooling set to -1? Where
> > do I find the definitions of these things... like the flags?
>
> Starting at the end, see acpi_thermal(4) ie 'man acpi_thermal'. Not
> sure about the flags, you may need to consult the sources.
>
> Apparently your BIOS is running the fan (ie active cooling) so there's
> no control of it you can access here. Both .active: -1 and .ACx: -1..
> indicate that, and the fact that your fan is cycling off and on. The
> usual advice about cleaning out the airways with compressed air (or
> well-directed moderate vacuum) applies. Old fans will sometimes need
> replacing, though it's when they stop being noisy (ie stop running), or
> are making grinding sounds (bearings) that you have to worry.
>
> You might want to check sysctl hw.acpi.thermal.tz0.temperature through a
> few fan cycles to see what internal temperature setpoints it's using for
> fan on and off, usually with some hysteresis either way. 60C is not
> hot, though likely hot enough to be running the fan at some level.
>
> 85C is pretty warm, when passive cooling kicks in (throttling or
> otherwise slowing the CPU to reduce heat), and has nothing to do with
> the fan, although it should also be running flat out at that time. You
> may need to monitor sysctl dev.cpu.0.freq to see that happening, if freq
> is variable. 95C should initiate an emergency shutdown.
>
> You should be able to set .user_override=1 then temporarily set ._PSV a
> good deal lower (say 70C) and make it work hard ('dd if=/dev/random
> of=/dev/null' works for me :) if you want to see what your system does
> to implement passive cooling. Old Celerons usually can be throttled to
> at least half speed, if not the full range of 1/8 to 7/8 max CPU speed.
>
> cheers, Ian
>
> > ----sysctl -a | grep thermal
> >
> > hw.acpi.thermal.min.runtime: 0
> > hw.acpi.thermal.polling_rate: 10
> > hw.acpi.thermal.user_override: 0
> > hw.acpi.thermal.tz0.temperature: 60.0C
> > hw.acpi.thermal.tz0.active: -1
> > hw.acpi.thermal.tz0.passive_cooling: 1
> > hw.acpi.thermal.tz0.thermal_flags: 0
> > hw.acpi.thermal.tz0._PSV: 85.0C
> > hw.acpi.thermal.tz0._HOT: -1
> > hw.acpi.thermal.tz0._CRT: 95.0C
> > hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
> > hw.acpi.thermal.tz0._TC1: 2
> > hw.acpi.thermal.tz0._TC2: 3
> > hw.acpi.thermal.tz0._TSP: 50
> >
> >
> > Any insight would be appreciated,
> >
> > -eg
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