Speedstep on centrino
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
Signature · 3 lines
Alexander Hoogerhuis | [email protected] CCNP - CCDP - MCNE - CCSE | +47 908 21 485 "You have zero privacy anyway. Get over it." --Scott McNealy
Quoted 5 lines · Alexander Hoogerhuis
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.
Quoted 3 lines
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.
Quoted 1 line
This seems to work and make the battery last an useful amount of time.
Good.
Quoted 4 lines
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
Quoted 4 lines · Jeremy Fitzhardinge
Quoted 3 lines · Alexander Hoogerhuis
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...
Quoted 1 line
Quoted 1 line
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
_______________________________________________
Cpufreq mailing list
[email protected]
http://www.linux.org.uk/mailman/listinfo/cpufreq