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Laptop-mode používam, cpufreq mam ... pokud jde o spotřebu, chápu dobře, že

cat /proc/acpi/battery/BAT0/state
present:                 yes
capacity state:          ok
charging state:          discharging
present rate:            17889 mW
remaining capacity:      27030 mWh
present voltage:         11294 mV

Další zkušenosti a poznámky:

cat /proc/acpi/power_resource/PUBS/state
state:                   on
system level:            S3
order:                   0
reference count:         0

cat /proc/acpi/processor/CPU/power
active state:            C2
max_cstate:              C8
bus master activity:     c6cffc87
states:
    C1:                  type[C1] promotion[C2] demotion[--] latency[000] usage[00000010]
   *C2:                  type[C2] promotion[C3] demotion[C1] latency[001] usage[01796593]
    C3:                  type[C3] promotion[--] demotion[C2] latency[085] usage[00000833]

cpufreq-info
cpufrequtils 0.4: cpufreq-info (C) Dominik Brodowski 2004
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
  driver: p4-clockmod
  CPUs which need to switch frequency at the same time: 0
  hardware limits: 188 MHz - 1.50 GHz
  available frequency steps: 188 MHz, 375 MHz, 563 MHz, 750 MHz, 938 MHz, 1.13 GHz, 1.31 GHz, 1.50 GHz
  available cpufreq governors: conservative, ondemand, powersave, userspace, performance
  current policy: frequency should be within 188 MHz and 563 MHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 563 MHz.