Kernel warning about CPU frequency
Nifty Hat Mitch
mitch48 at sbcglobal.net
Fri Oct 15 18:53:42 UTC 2004
On Thu, Oct 14, 2004 at 11:37:50PM -0400, Matthew Saltzman wrote:
> Any idea what this log message is?
> Warning: CPU frequency out of sync: cpufreq and timing core thinks of
> 600000, is 1600000 kHz.
> I'm running kernel-2.6.8-1.521 on a Thinkpad T41.
I am guessing...
Check out "cpuspeed".
$ chkconfig --list | grep cpuspeed
cpuspeed 0:off 1:on 2:on 3:on 4:on 5:on 6:off
Also tell us the chkconfig state of apmd and acpid.
Turn it on and off and reboot....
It may also be that automated power consumption (battery saver tricks)
are changing the clock rate of the processor. The higher the clock
rate the larger the power consumption so it is common for various
'idle' functions to run the processor at a lower clock rate.
Laptop vendors do a gazillion different things to make the battery
life as long as possible. The acpid interpreter and tool set are
commonly involved. BIOS configuration can tell you some of the option
settings. For example laptops should notice if they are docked or
connected to external power and behave accordingly. Lowering the seek
rate of disks, lowering the processor clock, using halt instructions
in contrast to idle loop/processing and more all save power.
There was some buzz about 'laptop' modes that I deleted because
I do not have a laptop.
T o m M i t c h e l l
May your cup runneth over with goodness and mercy
and may your buffers never overflow.
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