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Subject2.6.13-rc3 Battery times at 100/250/1000 Hz = Zero difference

I'd gladly (ehum..) redo this mind-numbingly boring test if someone can
point me to a magic software which unleashes some untapped powersaving
feature of the CPU.

_Kernel 2.6.13-rc3 Boot to Death_:

2h48m at 100 HZ
2h48m at 250 HZ
2h47m at 1000 HZ


touch time-hz-start
while (true) do
touch time-hz-end
sleep 1m


No distro (LFS-ish pure 64 bit), no X, no network, no cronjobs, no
peripherals attached. Screen off by hardware switch, but disk obviously
spinning all the time. powernow_k8 + cpufreq_userspace + powernowd-0.96
= 800 MHz at "idle". Fan(s?) always on unless room temperature falls to
a slightly chilly level.


Acer Aspire 1520 (1524) WLMi, AMD Athlon 64 3400+ (socket 754 according
to dmidecode-2.6). L1 64K/64K, L2 1024K, 512MB DDR RAM. Manufacturing
date 18 March 2005. Bought 20 May 2005. Battery used to full drain ca 5
times prior to this test (after the initial 3 charge/drains to reach its
full potential). "cat /proc/acpi/battery/BAT0/info":

present: yes
design capacity: 4000 mAh
last full capacity: 4000 mAh
battery technology: rechargeable
design voltage: 14800 mV
design capacity warning: 400 mAh
design capacity low: 120 mAh
capacity granularity 1: 280 mAh
capacity granularity 2: 3880 mAh
model number: Bat 8Cell
serial number: 236
battery type: Lion
OEM info: Acer

Mats Johannesson
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