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no CPU frequency scaling on AMD Sempron 2100

Discussion in 'System Hardware' started by longneck, Dec 11, 2011.

  1. longneck

    longneck New Member

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    I have 9.0-RC3 installed on an HP Thin Client that has a Mobile AMD Sempron(tm) Processor 2100+. I am trying to get cpufreq and powerd to manage the frequency of the processor, but I'm not having any luck. Here's some lines from dmesg:

    Code:
    FreeBSD 9.0-RC3 #0: Sun Dec  4 08:56:36 UTC 2011
        root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
    CPU: Mobile AMD Sempron(tm) Processor 2100+ (997.52-MHz K8-class CPU)
      Origin = "AuthenticAMD"  Id = 0x60fc2  Family = f  Model = 6c  Stepping = 2
      Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2>
      Features2=0x2001<SSE3,CX16>
      AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!>
      AMD Features2=0x119<LAHF,ExtAPIC,CR8,Prefetch>
    
    module_register: module cpu/ichss already exists!
    Module cpu/ichss failed to register: 17
    module_register: module cpu/est already exists!
    Module cpu/est failed to register: 17
    module_register: module cpu/hwpstate already exists!
    Module cpu/hwpstate failed to register: 17
    module_register: module cpu/p4tcc already exists!
    Module cpu/p4tcc failed to register: 17
    module_register: module cpu/powernow already exists!
    Module cpu/powernow failed to register: 17
    
    powerd: lookup freq: No such file or directory


    Any suggestions on how to get CPU frequency management working?
     
  2. User23

    User23 Member

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    Was the frequency scaling working before with another version of FreeBSD or OS?
    Have you checked the BIOS (enable Cool&Quiet or Powernow)? (well should be on on default)
    And please post the your output of:

    sysctl dev | grep freq
     
  3. longneck

    longneck New Member

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    I haven't put any other OS on this box so i don't know if it was working before or not.

    There are no options in the BIOS for Powernow or Cool'N'Quiet.

    Code:
    sysctl dev | grep freq 
    returns nothing.
     
  4. tyson

    tyson New Member

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  5. longneck

    longneck New Member

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    That's interesting. WikiPedia says it does not support PowerNow, but AMD docs do.

    My goal here is to get the heat output down. But if I can't, then I can't, so I won't.

    Thanks guys!