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lovecraft
Tux's lil' helper
Joined: 01 Jun 2003
Posts: 86
Location: Massachusetts, USA
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 Posted: Tue Feb 01, 2005 7:26 pm Post subject: |
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| blmartin777 wrote: | I still haven't been able to resolve my problem
NO: /sys/devices/system/cpu/cpu0/cpufreq/ and I can't create one
Any ideas on what I should do. |
Here's what I did:
1) Under Power management options -> CPU Frequency Scaling, set all processor-specific options as modules.
2) make && make install_modules, etc.
3) Look under /lib/modules/<your kernel name>/kernel/arch/i386/arch/cpu/cpufreq for a bunch of modules.
4) Choose one of these modules most relevant to your CPU and modprobe it.
You should now get a bunch of stuff under /sys to play with. Best of luck.
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samsonus
Apprentice
Joined: 18 Jan 2005
Posts: 225
Location: Siegen
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| Posted: Mon Mar 14, 2005 7:50 pm Post subject: |
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sorry, but i miss permission for the howto.
bye samsonus |
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catzooka
Apprentice
Joined: 05 Nov 2002
Posts: 193
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| Posted: Fri Mar 18, 2005 9:44 pm Post subject: |
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I also seem to have a problem with a Mobile Pentium 3 (Coppermine) on the Intel 440BX/ZX/DX chipset (on my Sony Vaio z505LSK notebook). Nothing shows up under /sys/devices/system/cpu/cpu0 despite having put in support in my kernel for it. I am running the latest gentoo-dev-sources at 2.6.11-r4. Interstingly enough, despite not getting any errors under dmesg, when I compile the driver support as a module, i get the error:
| Code: | meriloon linux # modprobe speedstep-smi
FATAL: Error inserting speedstep_smi (/lib/modules/2.6.11-gentoo-r4/kernel/arch/i386/kernel/cpu/cpufreq/speedstep-smi.ko): No such device |
Though I am pretty sure that my processor support cpu scaling, since cat /proc/cpuinfo reveals this:
| Code: | meriloon linux # cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 3
cpu MHz : 744.733
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 1470.46 |
Also, dmesg | grep 'CPU' reveals this:
| Code: | CPU: Intel Pentium III (Coppermine) stepping 03
ACPI: CPU0 (power states: C1[C1] C2[C2])
ACPI: Processor [CPU0] (supports 8 throttling states)
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So, what am I doing wrong here? Or am I just out of luck, and my specific CPU isn't supported with the kernel drivers? |
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brodo
Guru
Joined: 15 Apr 2003
Posts: 319
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| Posted: Sat Mar 19, 2005 10:01 pm Post subject: |
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Please re-check that your processor does support CPU frequency scaling before doing the following:
| Code: | | modprobe speedstep-smi smi_port=0xb2 smi_cmd=0x82 smi_sig=1 |
This overrides the values reported by the BIOS with the default values for controlling SpeedStep: several BIOSes report such faulty values to the kernel, causing CPU frequency scaling not to work properly. |
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catzooka
Apprentice
Joined: 05 Nov 2002
Posts: 193
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| Posted: Sun Mar 20, 2005 8:11 am Post subject: |
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Thanks a bunch, those arguments to the module worked like a charm. Thanks  |
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malusnyana
n00b
Joined: 26 Apr 2005
Posts: 5
Location: Coral Gables, FL / Ann Arbor, MI
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| Posted: Tue Apr 26, 2005 9:03 am Post subject: p-states |
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| jarealist wrote: |
Thanks for the howto. However, I'm having a problem getting the following module to load:
<M> ACPI Processor P-States driver
I get this from modprobe:
modprobe acpi
FATAL: Error inserting acpi (/lib/modules/2.6.4-gentoo-r1/kernel/arch/i386/kernel/cpu/cpufreq/acpi.ko): Device or resource busy
Any suggestions? All the other modules load OK. Here is my /etc/modules.autoload.d/kernel-2.6. |
| Earthwings wrote: |
It's the same for me. I haven't yet figured out what the problem is, but if you did, please post here |
Firstly, you are calling the module with an incorrect name i think. P-States module name is "acpi-cpufreq". Try modprobing that and see what you get.
It is my understanding that ACPI P-States are to allow ACPI to set the scaling of the CPU by using BIOS and DSDT interfaces. Using the CPUFreq speedstep driver changes the scaling by directly accessing the southbridge registers to change the frequency. (id be happy to be corrected on this one)
So, why would one use the Enhanced speedstepping at all, since with the ACPI P-states, you still have access to all the same govenors and frequency scaling options? Also, since the 2 modules are mutually exclusive (ie acpi-cpufreq will not load in conjunction with another cpufreq module (in my case speedstep-centrino, but i dont think this is limited to just my case obviously you cant have 2 things battling between changing the frequency, using different means).
Cheers all,
mat
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Science: "Why will this work?"
Management: "When will this work?"
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dgrant
Apprentice
Joined: 28 May 2003
Posts: 158
Location: Vancouver, BC, Canada
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| Posted: Thu Aug 04, 2005 12:42 am Post subject: |
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I'm also having a problem with Mobile Pentium 3 (Coppermine) on the Intel 440BX/ZX/DX chipset.
I've compiled all the acpi and cpufreq stuff as modules. I can't even load the speedstep-smi module, it reports an error, i.e. "can't insert module" or something like that.
This particular chipset is a real bitch. |
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Kernel & Hardware
