I've been twaddling with getting SpeedStep right on my laptop (HP
nc6000, 1.6GHz P-M) and noticed a few odd things:
Using regular SpeedStep is says to use speedstep-centrino due to
voltage regultion, etc.
Using SpeedStep for Centrino og gived me this line on boot:
speedstep-centrino: found "Intel(R) Pentium(R) M processor 1600MHz": max frequency: 1600000kHz
This seems to work and make the battery last an useful amount of time.
Using SpeedStep for Centrino with decoding the speeds and voltages
(CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI) will not yield any output during
boot regarding cpufreq at all and the battery useage is heavy. ACPI is
enabled.
mvh,
A
--
Alexander Hoogerhuis | [email protected]
CCNP - CCDP - MCNE - CCSE | +47 908 21 485
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On Sun, 2004-04-18 at 11:56, Alexander Hoogerhuis wrote:
> I've been twaddling with getting SpeedStep right on my laptop (HP
> nc6000, 1.6GHz P-M) and noticed a few odd things:
>
> Using regular SpeedStep is says to use speedstep-centrino due to
> voltage regultion, etc.
Yep, that's reasonable.
>
> Using SpeedStep for Centrino og gived me this line on boot:
> speedstep-centrino: found "Intel(R) Pentium(R) M processor 1600MHz": max frequency: 1600000kHz
Looks normal.
> This seems to work and make the battery last an useful amount of time.
Good.
> Using SpeedStep for Centrino with decoding the speeds and voltages
> (CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI) will not yield any output during
> boot regarding cpufreq at all and the battery useage is heavy. ACPI is
> enabled.
I've never managed to get ACPI working on my laptop, so I haven't tested
this. I'm not sure what's going on here - maybe someone on the cpufreq
list can help.
J
On Thu, Apr 22, 2004 at 08:18:38PM +1000, Jeremy Fitzhardinge wrote:
> On Sun, 2004-04-18 at 11:56, Alexander Hoogerhuis wrote:
> > Using SpeedStep for Centrino with decoding the speeds and voltages
> > (CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI) will not yield any output during
> > boot regarding cpufreq at all
This is normal; dmesg is kept clean if no error occurs -- in theory. Maybe
some errors do not result in printk()s yet, let's see...
> > and the battery useage is heavy. ACPI is enabled.
What does /proc/acpi/processor/./performance say, if it exists? and are
there files and proper values in /sys/devices/system/cpu/cpu0/cpufreq/ ?
Dominik