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styggentorsken
n00b
Joined: 05 Jul 2007
Posts: 22
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 Posted: Thu Jul 05, 2007 11:03 pm Post subject: CPU frequency scaling |
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Hi
I am quite new to gentoo, and have just almost completed my first installation.
I'm now trying to make my cpu clock automaticly up and down to save battery power on my laptop.
I used this guide: http://gentoo-wiki.com/HOWTO_Gentoo_on_laptops#CPU_frequency_scaling
And I used the command | Code: | | genkernel --menuconfig all |
to do the kernel changes.
When i closed the program it compiled a new kernel, and I assume its just to reboot to apply it?
But when I run
| Code: | localhost fredrik # cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU |
And during the bootup I get this message
| Code: | | cpufreqd requires the kernel to be configured with CONFIG_CPU_FREQ |
| Code: | localhost fredrik # zcat /proc/config.gz | grep CONFIG_CPU_FREQ
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=y
# CONFIG_CPU_FREQ_STAT_DETAILS is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=y
CONFIG_CPU_FREQ_GOV_USERSPACE=y
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=y |
| Code: | localhost fredrik # cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 36
model name : AMD Turion(tm) 64 Mobile Technology MT-37
stepping : 2
cpu MHz : 1989.867
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up pni lahf_lm ts fid vid ttp tm stc
bogomips : 3982.77
clflush size : 64 |
Any help appreciated  |
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Genone
Retired Dev
Joined: 14 Mar 2003
Posts: 9625
Location: beyond the rim
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| Posted: Fri Jul 06, 2007 12:32 am Post subject: |
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Do you have CONFIG_X86_POWERNOW_K8 enabled?
(Personally I'd just set the governor to ondemand or conservative manually via sysfs, that's easier to debug anyway)
Last edited by Genone on Fri Jul 06, 2007 12:36 am; edited 1 time in total |
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Lupin_the_3rd
Apprentice
Joined: 03 Apr 2005
Posts: 168
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| Posted: Fri Jul 06, 2007 12:33 am Post subject: |
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Well, I used the same HOWTO you did and it worked for me on my hp laptop with intel cpu. You can view my working kernel config here:
http://home.earthlink.net/~george164/dv9500t/dv9500t.html
Once your new kernel and modules are in place, reboot, and then:
emerge cpufrequtils
cpufreq-set -g conservative
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styggentorsken
n00b
Joined: 05 Jul 2007
Posts: 22
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| Posted: Fri Jul 06, 2007 2:31 pm Post subject: |
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That was it! 
CONFIG_X86_POWERNOW_K8 was set to m, changed it to y |
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