[ltp] Fan noise fix

Greg Meyer linux-thinkpad@linux-thinkpad.org
Sun, 1 Aug 2004 14:03:03 -0400


On Friday 30 July 2004 08:11 pm, Charles Gillet wrote:
> I'm starting to wonder whether some folks' temperature readings are
> completely accurate. =A0I just saw someone post a temp of 73C. =A0I would
> imagine components getting faulty and loose with such dramatic
> temperature swings. =A0Granted that mobile processors are different, the
> last time I built a desktop, I remember having problems with crappy
> heatsinks, and the CPU temp alarms barking at around 60C.
>
> Regarding not being able to compile ... with cpuspeed+ACPI you could.
> It would take your CPU down to 600 until it cools off then speed it up
> again and back down again ... etc, but you'd get your kernel. =A0I just
> checked the cpudyn page, and it looks like it doesn't care about apm or
> acpi, only cpufreq support, can handle spinning down disks, but has no
> way to monitor temp to keep your laptop from overheating.

You got me thinking, and I ended up adding a rule to cpufreqd.conf to slow=
=20
down the processor to 1200MHz when cpu usage is greater than 95% on AC powe=
r. =20
Seems to work okay and it'll prevent a forced shutdown.
=2D-=20
/g