Hi, I'm trying to get speedstepping working correctly on my new laptop which contains a 1.6 Pentium M CPU. I figured I'd give cpudyn a try (though if there are better alternatives, ideally ones available as debian packages, please inform me). I found
this page and took its advice. I compiled the module speedstep-centrino ("Intel Enhanced Speedstep") instead of speedstep-ich, along with the ones recommended by that page.
Code:
root@bunny:~# modprobe cpufreq-performance
root@bunny:~# modprobe cpufreq-powersave
No errors so far...
Code:
root@bunny:~# modprobe speedstep-centrino
FATAL: Error inserting speedstep_centrino (/lib/modules/2.6.10-jez/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.ko): No such device
D'oh.
Code:
root@bunny:~# tail /var/log/kern.log
Mar 22 21:14:10 bunny kernel: [fglrx] total AGP = 65536
Mar 22 21:15:59 bunny kernel: speedstep-centrino: invalid ACPI data
Mar 22 21:15:59 bunny kernel: speedstep-centrino: no table support for CPU model "Intel(R) Pentium(R) M processor 1.60GHz":
Mar 22 21:15:59 bunny kernel: speedstep-centrino: try compiling with CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI enabled
Mar 22 21:16:01 bunny kernel: speedstep-centrino: invalid ACPI data
Mar 22 21:16:01 bunny kernel: speedstep-centrino: no table support for CPU model "Intel(R) Pentium(R) M processor 1.60GHz":
Mar 22 21:16:01 bunny kernel: speedstep-centrino: try compiling with CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI enabled
Mar 22 21:16:02 bunny kernel: speedstep-centrino: invalid ACPI data
Mar 22 21:16:02 bunny kernel: speedstep-centrino: no table support for CPU model "Intel(R) Pentium(R) M processor 1.60GHz":
Mar 22 21:16:02 bunny kernel: speedstep-centrino: try compiling with CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI enabled
(Yeah, I tried modprobing it 3 times just for good measure)
Guess what? I already DID compile with CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI enabled...
I've also tried with CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE ("Built-in tables for Banias CPUs") compiled in too, even though my CPU is a Dothan, not a Banias.
As it stands, I can insert the module acpi-cpufreq instead of speedstep-centrino, and this is loaded successfully. I can then load cpudyn and the frequency scaling does appear to work to an extent, however the CPU seems to drop to its minimum frequency for a second then immediately rise up to full again, then a few seconds later it'll drop again for only a second. This is when the system is under a very light load and the CPU is certainly not busy. I'm not sure whether this is cpudyn's fault, or perhaps it's because I'm using acpi-cpufreq rather than speedstep-centrino.
So what this comes down to is:
Q1. If this is just cpudyn being a little too simple for my tastes, could you recommend an alternative?
Q2. If this is down to my use of acpi-cpufreq instead of speedstep-centrino, could you suggest a reason for the errors I'm receiving?
I'm running Debian Sarge on kernel 2.6.10.
Thanks for your time
