Strangely, I accidentally booted a 3.2 kernel this morning and it is
working at full speed. The machine is a desktop, so it is always on AC
power.
anton@smeg:~$cat /proc/version_signature
Ubuntu 3.2.0-22.35-generic 3.2.14
anton@smeg:~$cpufreq-info
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpuf...@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: 1.60 GHz - 1.87 GHz
available frequency steps: 1.87 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 1.60 GHz and 1.87 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.87 GHz.
cpufreq stats: 1.87 GHz:62.86%, 1.60 GHz:37.14% (658)
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: 1.60 GHz - 1.87 GHz
available frequency steps: 1.87 GHz, 1.60 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 1.60 GHz and 1.87 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.87 GHz.
cpufreq stats: 1.87 GHz:54.78%, 1.60 GHz:45.22% (540)
I am beginning to think that the BIOS or hardware is at fault.
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https://bugs.launchpad.net/bugs/962947
Title:
CPU scaled back to very slow speed, cannot increase speed
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