[Bug 16362] only the lowest frequency is used - scaling_max_frequency is set to lowest frequency and directly reset if changed

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https://bugzilla.kernel.org/show_bug.cgi?id=16362





--- Comment #1 from timshel@xxxxxxxxxxxxxx  2010-07-10 14:29:04 ---
dmesg cpu output:
[    0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[    0.000000] ACPI: SSDT 00000000bb779000 009F1 (v01  PmRef    CpuPm 00003000
INTL 20050513)
[    0.000000] ACPI: SSDT 00000000bb778000 00259 (v01  PmRef  Cpu0Tst 00003000
INTL 20050513)
[    0.000000] SMP: Allowing 4 CPUs, 0 hotplug CPUs
[    0.000000] setup_percpu: NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:4
nr_node_ids:1
[    0.000000] PERCPU: Embedded 28 pages/cpu @ffff880001e00000 s84136 r8192
d22360 u524288
[    0.000000] pcpu-alloc: s84136 r8192 d22360 u524288 alloc=1*2097152
[    0.000000] pcpu-alloc: [0] 0 1 2 3 
[    0.001838] CPU: Physical Processor ID: 0
[    0.001839] CPU: Processor Core ID: 0
[    0.001846] mce: CPU supports 9 MCE banks
[    0.001854] CPU0: Thermal monitoring enabled (TM1)
[    0.185787] CPU0: Intel(R) Core(TM) i5 CPU       M 540  @ 2.53GHz stepping
02
[    0.566303] Brought up 4 CPUs
[    0.734900] ACPI: SSDT 00000000bb71aa18 004B1 (v01  PmRef  Cpu0Ist 00003000
INTL 20050513)
[    0.735707] ACPI: SSDT 00000000bb718718 006B2 (v01  PmRef  Cpu0Cst 00003001
INTL 20050513)
[    0.818797] cpuidle: using governor ladder
[    0.818798] cpuidle: using governor menu
[  119.423212] CPUFREQ: Per core ondemand sysfs interface is deprecated -
up_threshold

/sys/devices/system/cpu/cpu0/cpufreq> ls
affected_cpus               ondemand                       scaling_governor
bios_limit                  related_cpus                   scaling_max_freq
cpuinfo_cur_freq            scaling_available_frequencies  scaling_min_freq
cpuinfo_max_freq            scaling_available_governors    scaling_setspeed
cpuinfo_min_freq            scaling_cur_freq
cpuinfo_transition_latency  scaling_driver

/sys/devices/system/cpu/cpu0/cpufreq> cat *
0
1199000
cat: cpuinfo_cur_freq: Permission denied
2534000
1199000
10000
cat: ondemand: Is a directory
0 1 2 3
2534000 2533000 2399000 2266000 2133000 1999000 1866000 1733000 1599000 1466000
1333000 1199000 
conservative userspace powersave ondemand performance 
1199000
acpi-cpufreq
ondemand
1199000
1199000
<unsupported>

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