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    HP dv2699el (dv2500 series): cpu frequency scaling not working under Linux, ACPI issue?

    Discussion in 'HP' started by icest0rm, Dec 14, 2007.

  1. icest0rm

    icest0rm Newbie

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    Hi,
    I've just bought an HP Pavillon DV26xx (DV2500 series).
    My ubuntu 7.10 64bit is working perfectly apart from CPU Frequency scaling.
    This is CPU data:

    brex@ubuntu-box:~$ cat /proc/cpuinfo
    processor : 0
    vendor_id : GenuineIntel
    cpu family : 6
    model : 15
    model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
    stepping : 11
    cpu MHz : 2194.736
    cache size : 4096 KB
    physical id : 0
    siblings : 2
    core id : 0
    cpu cores : 2
    fpu : yes
    fpu_exception : yes
    cpuid level : 10
    wp : yes
    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
    bogomips : 4393.94
    clflush size : 64
    cache_alignment : 64
    address sizes : 36 bits physical, 48 bits virtual
    power management:

    (same for Processor 1 - the second core)

    this is when I try to load acpi-cpufreq

    brex@ubuntu-box:~$ sudo modprobe acpi-cpufreq
    FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.22-14-generic/kernel/arch/x86_64/kernel/cpufreq/acpi-cpufreq.ko): No such device

    no other modules for frequency scaling work....

    I also get this:


    brex@ubuntu-box:~$ ls /sys/devices/system/cpu/
    cpu0 cpu1 sched_mc_power_savings

    brex@ubuntu-box:~$ ls /sys/devices/system/cpu/cpu0/
    cache crash_notes thermal_throttle topology

    brex@ubuntu-box:~$ lsmod | grep -i cpufreq_stats
    cpufreq_stats 8160 0
    freq_table 6464 2 cpufreq_stats,cpufreq_ondemand

    I also get this errors about ACPI when loading acpi-cpufreq:

    [ 1008.017253] ACPI Error (psargs-0355): [\_PR_.CPU0._PSS] Namespace lookup failure, AE_NOT_FOUND
    [ 1008.017259] ACPI Error (psparse-0551): Method parse/execution failed [\_PR_.CPU1._PSS] (Node ffff81007cf59de0), AE_NOT_FOUND
    [ 1008.017293] ACPI Exception (processor_perflib-0234): AE_NOT_FOUND, Evaluating _PSS [20070126]

    I'm already using latest BIOS for my laptop (F.21...there was a F.13 standard when I bought it but I didn't pay attention if speedstep was working on it.)

    This problem is quite annoying since when CPU runs at 100% for long time I get temps about 70-80°C and the laptop gets quite hot.

    Any suggestion?
    Thanks
     
    icest0rm, Dec 14, 2007
    #1