Dotaz: cpufreq, nulove rozpeti frekvenci

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Dobry den, nedavno jsem prisel na to ze mnou pracne nastavene cpu frequency scaling prestalo fungovat tak jak ma. Vetsinu veci jsem opravil ale na nektere jsem proste kratky:

 # cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0 1
  hardware limits: 1000 MHz - 2.00 GHz
  available frequency steps: 2.00 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
  available cpufreq governors: conservative, userspace
  current policy: frequency should be within 2.00 GHz and 2.00 GHz.
                  The governor "conservative" may decide which speed to use
                  within this range.
  current CPU frequency is 2.00 GHz (asserted by call to hardware).
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0 1
  hardware limits: 1000 MHz - 2.00 GHz
  available frequency steps: 2.00 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
  available cpufreq governors: conservative, userspace
  current policy: frequency should be within 2.00 GHz and 2.00 GHz.
                  The governor "conservative" may decide which speed to use
                  within this range.
  current CPU frequency is 2.00 GHz (asserted by call to hardware).

Problem je v tucne vyznacenych radcich. Nebot nedava prakticky zadnou moznost rozpeti frekvenci. Kdyz namackam do konzole:

# echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
# cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0 1
  hardware limits: 1000 MHz - 2.00 GHz
  available frequency steps: 2.00 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
  available cpufreq governors: conservative, userspace
  current policy: frequency should be within 1000 MHz and 2.00 GHz.
                  The governor "conservative" may decide which speed to use
                  within this range.
  current CPU frequency is 1000 MHz (asserted by call to hardware).
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0 1
  hardware limits: 1000 MHz - 2.00 GHz
  available frequency steps: 2.00 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
  available cpufreq governors: conservative, userspace
  current policy: frequency should be within 1000 MHz and 2.00 GHz.
                  The governor "conservative" may decide which speed to use
                  within this range.
  current CPU frequency is 1000 MHz (asserted by call to hardware).

A skalovani frekvence mi vesele funguje. Problem ale je po rebootu. Zase dostanu vyse uvedeny vypis s nulovym rozsahem. Je mi jasne ze si muzu napsat script ktery mi to po startu upravi. Ale rekl bych ze jsem nekde jenom neco spatne nastavil a radeji bych to opravil. Za odpoved moc moc dekuju.

Odpovědi

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Skvěle, tak jako obvykle byla chyba kdesi mezi klávesnicí a židlí. Náhodou jsem zjistil že při nabootování notebooku bez připojeného zdroje je vše OK. Takže jsem se podíval na nastavení v /etc/cpufreqd.conf a tam si našel že při připojené baterii se má jet na profil Performance. Stačilo toto zakomentovat a chová se to tak jak chci.