[ltp] Thinkpad high pitched noise

[Andreas]

Hello,

> problem according to some threads, does it slow down the computer or harm
> the laptop? any one?

With a lower HZ value your system can be less responsive but the general 
throughput can be higher because the cpu spends less time in interrupt 
handling. But I seriously doubt that lowering HZ can harm a computer. This is 
done quite easily by editing include/asm-i386/param.h or you can use the -ac 
patch which IIRC makes HZ a config option, so you can easily try 
different HZ values (it is possible to use a HZ value different from 100 or 
1000, too).

You may also find the thread "[ltp] high pitch noises with ThinkPad 
23" (24.1.2005, Martin Steigerwald) about omitting the ACPI kernel modules 
"processor" interesting (but Christopher Sawtell remarked that this did harm 
his DVD drive).

If you use frequency scaling you can also try if 
setting /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq to a lower 
value has any effect on the noise.

Bye
 Andreas