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Re: cpu speed problem

fedora wrote:
Hi listers

here is a laptop with

[root myhost ~]# cat /etc/fedora-release
Fedora release 7 (Moonshine)
[root 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 myhost ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
[root myhost ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
[root myhost ~]# echo "997500" >/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed [root myhost ~]# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
[root 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


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.


	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.

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