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View Full Version : [ubuntu] CPU Frequency Scaling -- worked in dapper, not in hardy


randysparks
June 19th, 2008, 01:27 PM
I'm trying to get manual control over CPU throttling on an AMD Athlon64 2.4GHz chip.

It worked fine under Dapper once I'd run sudo dpkg-reconfigure gnome-applets and enabled sudo access.

Now with hardy it just won't work. I've tried installing cpufreqd, but no dice, so I switched back to powernow.

I've tried entering noapic in my kernel line. No good.

What am I missing?

stchman
June 19th, 2008, 02:13 PM
I'm trying to get manual control over CPU throttling on an AMD Athlon64 2.4GHz chip.

It worked fine under Dapper once I'd run sudo dpkg-reconfigure gnome-applets and enabled sudo access.

Now with hardy it just won't work. I've tried installing cpufreqd, but no dice, so I switched back to powernow.

I've tried entering noapic in my kernel line. No good.

What am I missing?

You need to have the frequency scaling called powernow enabled in the BIOS. Once you do that Ubuntu will be able to scale the frequency according to load.\

I have an Atlong 64 3500+ (2.2GHz) and it scales well using Hardy 64.

randysparks
June 20th, 2008, 05:37 AM
You need to have the frequency scaling called powernow enabled in the BIOS. Once you do that Ubuntu will be able to scale the frequency according to load.\

I have an Atlong 64 3500+ (2.2GHz) and it scales well using Hardy 64.

Well, I couldn't find anyting in the BIOS along those lines. All I saw was "Cool and Quiet", which is disabled, as I believe it has to be for this to work.

Besides which, it worked fine on Dapper and I haven't tweaked the BIOS since then.

Oh well.

ukripper
June 20th, 2008, 06:31 AM
can you post output of the following:
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies