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Sean Hayes
August 24th, 2009, 04:09 PM
I installed the GNOME CPU Frequency Scaling Monitor and powernowd, but it says CPU scaling is unsupported. My processor is an AMD Athlon 64 Socket 754 3700+. I haven't found info on whether it's supposed to support it, but when I had Windows installed I was able to create a power plan that reduced the CPU usage. Is there anyway to implement this in Ubuntu?

Sean Hayes
September 5th, 2009, 11:19 PM
*Bump*

Should I post this in another forum section?

Temüjin
September 6th, 2009, 12:55 AM
Linux supports PowerNow/Cool'n'Quiet. The only thing I have installed on my Athlon is cpufreq-utils.

Sean Hayes
September 8th, 2009, 08:09 PM
Linux supports PowerNow/Cool'n'Quiet. The only thing I have installed on my Athlon is cpufreq-utils.

Does this help at all?

saints@saints-htpc:~$ sudo cpufreq-info
cpufrequtils 004: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to cpufreq@lists.linux.org.uk, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU

saints@saints-htpc:~$ sudo dmesg | grep -i power
[ 2.960814] input: Power Button (FF) as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
[ 2.960820] ACPI: Power Button (FF) [PWRF]
[ 2.960907] input: Power Button (CM) as /devices/LNXSYSTM:00/device:00/PNP0C0C:00/input/input1
[ 2.960913] ACPI: Power Button (CM) [PWRB]
[ 7.211389] powernow-k8: Found 1 AMD Athlon(tm) 64 Processor 3700+ processors (1 cpu cores) (version 2.20.00)
[ 7.216574] powernow-k8: BIOS error - no PSB or ACPI _PSS objects

Temüjin
September 8th, 2009, 10:18 PM
powernow-k8: BIOS error - no PSB or ACPI _PSS objects
That's not good :( Make sure you have the latest BIOS. If it still doesn't work, your only hope is modifying the DSDT: See: http://acpi.sourceforge.net/dsdt/index.php