Re: System clock speed too high - 2.6.3 kernel

Dominik Brodowski
2004-04-06T21:51:08Z

On Tue, Mar 30, 2004 at 07:25:39AM -0800, john stultz wrote:
> On Fri, 2004-03-26 at 15:00, Praedor Atrebates wrote:
> > On Friday 26 March 2004 04:22 pm, john stultz held forth thus:
> > > On Fri, 2004-03-26 at 11:30, Praedor Atrebates wrote:
> > > > In doing a web search on system clock speeds being too high, I found
> > > > entries describing exactly what I am experiencing in the linux-kernel
> > > > list archives, but have not yet found a resolution.
> > > >
> > > > I have Mandrake 10.0, kernel-2.6.3-7mdk installed, on an IBM Thinkpad
> > > > 1412 laptop, celeron 366, 512MB RAM. I am finding that my system clock
> > > > is ticking away at a rate of about 3:1 vs reality, ie, I count ~3 seconds
> > [...]
> > > Could you please send me dmesg output for this system?
> > >
> > Attached is the output of dmesg.
>
> You mentioned that your system is an older laptop, and you're setting
> "acpi=on" in your boot arguments. What happens when you omit "acpi=on"?
> Do you get a message saying something to the effect of your system being
> too old for ACPI? Does everything still work as it ought?

Hm, could you please verify that ACPI throttling and cpufreq is _disabled_
when you do this check? For throttling, please do

echo 1 > /proc/acpi/processor/./throttling
echo 0 > /proc/acpi/processor/./throttling

[just echo'ing 0 is a noop if ACPI thinks it's at T0... and we want to force
T0].

Dominik