cpufreq driver seems to be loaded and working on your machine, from dmesg:
[ 2.540266] powernow-k8: Found 1 AMD Athlon(tm)X2 DualCore QL-60 (2 cpu
cores) (version 2.20.00)
[ 2.540332] powernow-k8: 0 : pstate 0 (1900 MHz)
[ 2.540335] powernow-k8: 1 : pstate 1 (950 MHz)
In the applet, probably you have to set something like powersave mode, or you
can do:
sudo su -c "echo powersave >
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor"
(then repeat the command, but for cpu 1)
That will force both cpus in your case to stay at 950MHz.
Also if applet fails to set scaling_governor to userspace, may be that's
why it can't set the speed (using scaling_setspeed), so you can try also
seting userspace instead of powersave to scaling_governor and use the
applet again. In case this works, then applet is buggy, not the kernel.
You can also do it manually, set userspace to scaling_governor, and
write to scaling_setspeed in the same
/sys/devices/system/cpu/cpu*/cpufreq/ directory the clock speed you want
(950000 for 950Mhz or 1900000 for 1.9Ghz).
Please test this and report here if it works.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/768649
Title:
Ubuntu cannot change frequency of Athlon X2 laptop CPU
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