Powernow-k8 full speed on AC only
I have the Mitac 855 Athlon64 laptop (same machine as Erich). I have successfully got dynamic power throttling and full cpu speed working in kernels 2.6.4-54.5 and 2.6.8-rc2 but only when the power is applied. If I remove power, the system drops to 800MHz and remains there, no matter what power profiles are configured, or what speed is passed to /sys/devices/system/cpu/cpu0/cpufreq. I was forced to set other=ignore in /etc/powersaved.conf as suggested by Andi Kleen (thanks!) but that's all I changed, besides trying to force full speed in the battery profile. Also, when I boot up on battery, the speed remains at 800MHz even if I restart powersaved. Similarly if I suspend to disk, and then resume. (More on suspend/standby later ;) Any Ideas?? Thanks! Cosmo -- Cosmo King Systems Engineer Pogo Linux, Inc. 888.828.7646 cosmo*pogolinux*com
On Mon, Jul 26, 2004 at 11:40:03PM -0700, Cosmo King wrote:
I have the Mitac 855 Athlon64 laptop (same machine as Erich).
I have successfully got dynamic power throttling and full cpu speed working in kernels 2.6.4-54.5 and 2.6.8-rc2 but only when the power is applied. If I remove power, the system drops to 800MHz and remains there, no matter what power profiles are configured, or what speed is passed to /sys/devices/system/cpu/cpu0/cpufreq.
I was forced to set other=ignore in /etc/powersaved.conf as suggested by Andi Kleen (thanks!) but that's all I changed, besides trying to force full speed in the battery profile.
Also, when I boot up on battery, the speed remains at 800MHz even if I restart powersaved. Similarly if I suspend to disk, and then resume. (More on suspend/standby later ;)
Any Ideas??
The BIOS sets up this limit. Apparently Mitac designed the battery to only reliably work with 800Mhz. Powernow-k8 won't exceed BIOS mandated limits to prevent damage to your hardware. -Andi
participants (2)
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Andi Kleen -
Cosmo King