powerd to use sysctl to import temps to drop freq to avoid heat crash

[Warner Losh]

On Jan 3, 2012, at 6:38 PM, Dmitry Kolosov wrote:

> 
>> 	hw.acpi.thermal.tz0.temperature: 67.0C
>> 	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: 90.0C
>> 	hw.acpi.thermal.tz0._HOT: 95.0C
>> 	hw.acpi.thermal.tz0._CRT: 100.0C
>> 	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: 40
> 
> Use 
> hw.acpi.thermal.user_override=1
> in sysctl.conf to allow override of thermal settings. Now you can set custom 
> _PSV, _HOT and _CRIT. Worked well for me on my previous HP Pavilion dv6 series 
> laptop. 
> More complex resolution of overheating problem - consider to sell HP asap and 
> get any other laptop. HP totaly failed on cooling on almost all models, they 
> are all hothothot.

I fought for two years the overheading of my HP laptop.  Some of the following might help, or they might not:

(1) blow the dust out of the dang thing.  HP's clog up with dust making their fans about useless.
(2) make sure the fans are spinning at full speed.
(3) replace any broken fans
(4) give up and get a different computer...  that's what I did in the end (although not until after the power board went out on the goofy thing).

Warner