CPU temp

Pastor JW pastor_jw at the-inner-circle.org
Sat May 16 16:52:43 UTC 2009

On Saturday 16 May 2009 2:41:19 am marc wrote:
> Cary Bielenberg said:
> > marc wrote:
> >> Pastor JW said:
> >>> I've had something strange happening the past couple of days.  My CPU
> >>> temp normally runs at 46-49 C but a couple days ago the fan went on
> >>> full and the temp went to 84 C which I think is not good, and did not
> >>> come back down. Running top shows python taking 100% of CPU.  Looking
> >>> at the logs does not seem to say any error, or at least I can't spot
> >>> any.  I don't know what called python or what was running any
> >>> differently than usual.  Running 8.04 KDE 3.5.10 T5450 Intel Core 2
> >>> Duo, 4 Gig memory. Anyone have any idea about what is causing this?
> >>
> >> No, but I experience the same thing with kwin. No idea what it is.
> >
> > I have the same problem I have rectified by selecting aggressive power
> > saving mode. My xorg & plasma are consuming almost 100% cpu.
> Just an FYI for anyone reading this:
> For light use, especially on a laptop even on mains power, I usually
> switch to the 'Powersave' power governor. It's easy to switch governors
> now via:
>   <alt>+f2
>   power govenor
> then select from the list.
> If you want to explore this area a little, try installing the cpufrequtils
> package (it's tiny) and do:
>   $ cpufreq-info
> There's an interesting read about Linux power management here:
>   http://www.gentoo.org/doc/en/power-management-guide.xml

It has always been easy in Kubuntu to change the CPU frequency by just right 
clicking the battery icon and setting the CPU policy but that is not the 
problem at all.  The problem is a program all of a sudden taking 100 % of the 
CPU and not letting go.  Dropping to "powersave" did not stop the problem 
although it did get the temperature of the CPU down to 79C.  To stop it 
required a reboot, then the temp came back down to the normal after a minute 
or so.  However, for no apparent reason, about two hours later it all 
happened again.  Again, according to top, it is python taking 100 % of CPU. 
and again the only way to stop it is to reboot.  The logs do not tell me what 
is going on.  Or at least I find no mention of python.  This is not normal 
for this machine and only started a few days ago.  Like I said, it's normal 
CPU temp is about 46-49 and has been for several months.  

73 de N7PSV aka Pastor JW <n><   PDGA# 35276
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