He conseguido que cpufreq-info funcione de la siguiente forma:
# modprobe acpi-cpufreq
# cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to
cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.83 GHz
available frequency steps: 1.83 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: powersave, ondemand, userspace, performance
current policy: frequency should be within 1000 MHz and 1.83 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.83 GHz (asserted by call to hardware).
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1000 MHz - 1.83 GHz
available frequency steps: 1.83 GHz, 1.33 GHz, 1000 MHz
available cpufreq governors: powersave, ondemand, userspace, performance
current policy: frequency should be within 1000 MHz and 1.83 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.83 GHz (asserted by call to hardware).
pero el caso es que ni con bateria he visto todavia una frecuencia de procesador mas baja de 1,83 GHz