The culprit turns out to be:
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
Apparantly on this laptop (Dell D630) something goes wrong with acpi-
cpufreq after suspend-resume. I tried it now on a fresh boot, and now I
get:
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to [EMAIL PROTECTED], please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 0 1
hardware limits: 800 MHz - 2.20 GHz
available frequency steps: 2.20 GHz, 2.20 GHz, 1.60 GHz, 1.20 GHz, 800 MHz
available cpufreq governors: powersave, ondemand, conservative, userspace,
performance
current policy: frequency should be within 800 MHz and 2.20 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 800 MHz.
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 0 1
hardware limits: 800 MHz - 2.20 GHz
available frequency steps: 2.20 GHz, 2.20 GHz, 1.60 GHz, 1.20 GHz, 800 MHz
available cpufreq governors: powersave, ondemand, conservative, userspace,
performance
current policy: frequency should be within 800 MHz and 2.20 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 800 MHz.
and playback is just fine, the CPU being at full speed the whole time.
Since the problem is actually caused by something else, I am marking
this as invalid.
** Changed in: linux-meta (Ubuntu)
Status: New => Invalid
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cpu frequency scaling makes movie playback choppy
https://bugs.launchpad.net/bugs/223556
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