Public bug reported:
By default I can't change the cpu frequency when my system is just booted. It's
stuck to 800MHz
My supported frequencies are 800MHz, 1,6GHz, 1,8GHz and 2,0GHz.
I use the applet for gnome-panel and I can click 1,6, 1,8 and 2,0 but it never
changes, it continues stuck at 800MHz.
Workaround:
I have found a solution to make it work. If I open a terminal and type (as root
obviously):
modprobe -r cpufreq_stats; modprobe acpi_cpufreq; modprobe cpufreq_stats;
I get:
FATAL: Error inserting acpi_cpufreq
(/lib/modules/2.6.27-3-generic/kernel/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.ko):
Device or resource busy
acpi_cpufreq is not loaded, but CPU SCALING WORKS!!
This is quite wierd.
To make it weirder: if my laptop is connected to the current, cpu scaling works
without any workaround but if I disconnect it, cpu scaling doesn't work.
Everytime that my system is rebooted I have to do it to get cpu scaling
working with batteries.
System:
Ubuntu 8.10 fully updated (18 sept)
Laptop is HP Pavilion tx2000 model (some other users have reported this issue
in ubuntuforums too).
logs.tar.gz includes:
uname -a
version_signature
dmesg
lspci -vvnn
dmidecode
/proc/acpi
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
Need to unload/load some modules in order to get cpu-scaling working
https://bugs.launchpad.net/bugs/271973
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