can't enable cpufreq ondemand governor

can't enable cpufreq ondemand governor

[Andreas Eriksson]

The kernels I have tried it with are 2.6.15-1-686 and 2.6.15-ck3 and
2.6.15 vanilla, and this happens with all of those.
When I try to enable the ondemand or the conservative governors it
gives an error message:

 # pwd
/sys/devices/system/cpu/cpu0/cpufreq
# cat scaling_available_governors
userspace conservative ondemand performance
# echo performance > scaling_governor
# echo userspace > scaling_governor
 # echo ondemand > scaling_governor
bash: echo: write error: invalid argument
# echo conservative > scaling_governor
bash: echo: write error: invalid argument
# cat scaling_governor
userspace

 Here is some info about my system, tell me if you need more:
IBM Thinkpad R40 Laptop
Debian Sid updated yesterday
Pentium 4 2ghz

# lsmod | grep cpu
cpufreq_userspace       4216  1
cpufreq_conservative     6692  0
cpufreq_ondemand        5820  0
# lsmod | grep speed
speedstep_ich           4844  0
speedstep_lib           3972  1 speedstep_ich
freq_table              4164  1 speedstep_ich

Using powernowd with the userspace governor works fine.
Please cc any replies to me since I'm not subscribed to the list.

--
Andreas Eriksson (TPC)

Re: can't enable cpufreq ondemand governor

[Mattia Dongili]

On Fri, Feb 03, 2006 at 07:49:10PM +0100, Andreas Eriksson wrote:
> The kernels I have tried it with are 2.6.15-1-686 and 2.6.15-ck3 and
> 2.6.15 vanilla, and this happens with all of those.
[...]
> # lsmod | grep speed
> speedstep_ich           4844  0
> speedstep_lib           3972  1 speedstep_ich
> freq_table              4164  1 speedstep_ich

support for ondemand on speedstep-ich has been merged in 2.6.16-rc1
or .15 but using the -mm patchset.

If you don't want to test such kernels you can grab these 2 commits and
apply to 2.6.15 (they'll probably apply cleanly)
<url>http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=9a7d82a89a8bf55b112f2a5c3b3f405eb95a4303;hp=1a10760c91c394dfe4adfefeeaf85cd8098c4894</url> 
<url>http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff_plain;h=1a10760c91c394dfe4adfefeeaf85cd8098c4894;hp=fc457fa7c0cdbfe96812ba377e508880d600298f</url>                                                                                                                 

hth
-- 
mattia
:wq!