cpu speed problem

[fedora]

thank you very much for your realistic and handy solutions.

suomi

Karl Larsen wrote:
> fedora wrote:
>> Hi listers
>>
>> here is a laptop with
>>
>> [root at myhost ~]# cat /etc/fedora-release
>> Fedora release 7 (Moonshine)
>> [root at myhost ~]#
>>
>> worked well until 10 days ago. then, the laptop started its fan, and 
>> drove down its cpuspeed to about a quarter of the speed before. if i 
>> run the system-monitor, the cpu is busy always about 30 %, whereas 
>> before it was busy only about 6 %.
>> The fan from then on is never stopped and the CPU stays low in 
>> performance from then on. i have to do a power down (either 
>> pm-hibernate or halt/reboot) in order to make it come up with the 
>> "full" performance and stay there for a while. after that, the fan 
>> starts again and the cpu slows down.
>>
>> after some googling i tried the following:
>>
>> [root at myhost ~]# cat 
>> /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
>> 997500
>> [root at myhost ~]# cat 
>> /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
>> 731500
>> [root at myhost ~]# echo "997500" 
>> >/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
>> [root at myhost ~]# cat 
>> /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
>> 997500
>> [root at myhost ~]#
>>
>> i also changed the parameters of the cpuspeed program, so that now it 
>> comes up with:
>>
>>  1413 ?        Ss     0:01 cpuspeed -d -p 90 45 -m 731500 -M 997500 -n
>>
>> all to no avail.
>>
>> i also checked to see, whether in the BIOS the intelCPUstepping is 
>> enabled, and it is enabled.
>>
>> i understand, that the fan at a certain point in time starts turning. 
>> but i don't understand, why at the same time, the cpu slows down.
>>
>> has anyone got an idea, where this immediate change stems from and how 
>> i could stop it?
>>
>> thanks in advance for any reply
>>
>> suomi
>>
>    I don't know your laptop but it sounds like you have a lot of dirt 
> and lint inside the box making it hard for the fan to cool. I have used 
> a vacume sweeper with a lot of suck and the crud really comes out.
> 
>