Tiny Core Extensions > TCE Tips & Tricks
Cpu frequency scaling basics
bmarkus:
--- Quote from: 4-stroke on October 15, 2009, 02:48:51 AM ---On my Eeepc900 with the celeron processor loading the acpi-cpufreq module doesn't work and with the p4-clockmod module it just became very sluggish and battery time didn't increase at all.
--- End quote ---
I do not have Eeepc900 in hand but according to different articles its BIOS supports scaling via ACPI so it is expected to work. I see Kernel patches to support Eeepc900 back in November 2008. Do not know wether the current TC kernel supports it or not.
4-stroke:
--- Quote from: bmarkus on October 15, 2009, 03:19:50 AM ---
--- Quote from: 4-stroke on October 15, 2009, 02:48:51 AM ---On my Eeepc900 with the celeron processor loading the acpi-cpufreq module doesn't work and with the p4-clockmod module it just became very sluggish and battery time didn't increase at all.
--- End quote ---
I do not have Eeepc900 in hand but according to different articles its BIOS supports scaling via ACPI so it is expected to work. I see Kernel patches to support Eeepc900 back in November 2008. Do not know wether the current TC kernel supports it or not.
--- End quote ---
I found the answer in this thread:
http://forum.eeeuser.com/viewtopic.php?id=74209
PS. I've read your pm. I'll try it out when I get home. Thanks! ;D
bmarkus:
Thanks for the info. Seems that the key is EeePC ACPI Utilities at:
http://sourceforge.net/projects/eeepc-acpi-util/
which is not available (yet) in the TC repo. Strange enough there is an MS .exe binary in the bin folder while it looks a LINUX package. ???
Juanito:
You can achieve a lot by playing with the conf file in the cpufreq extension
jls:
--- Code: ---root@box:~# cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 8
model name : AMD Sempron(tm) 2500+
stepping : 1
cpu MHz : 1748.190
cache size : 256 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 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow up
bogomips : 3497.06
clflush size : 32
power management: ts
root@box:~# modprobe powernow-k7
modprobe: failed to load module powernow-k7: No such device
root@box:~# modprobe acpi-cpufreq
modprobe: failed to load module acpi-cpufreq: No such device
root@box:~#
--- End code ---
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