This is still happening for me on:
Linux xxx.xxx.org 3.0.0-24-generic #40-Ubuntu SMP Tue Jul 24
15:38:25 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
# service loadcpufreq start
* Loading cpufreq kernel modules...
FATAL: Error inserting p4_clockmod
(/lib/modules/3.0.0-24-generic/kernel/drivers/cpufreq/p4-clockmod.ko): Invalid
argument
FATAL: Error inserting pcc_cpufreq
(/lib/modules/3.0.0-24-generic/kernel/drivers/cpufreq/pcc-cpufreq.ko): No such
device
[fail]
# cpufreq-info
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to [email protected], please.
analyzing CPU 0:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 2:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
analyzing CPU 3:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 4294.55 ms.
# lshw -class cpu
*-cpu
description: CPU
product: Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
vendor: Intel Corp.
physical id: 40
bus info: cpu@0
version: Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
slot: SOCKET 0
size: 3400MHz
capacity: 3800MHz
width: 64 bits
clock: 100MHz
capabilities: x86-64 fpu fpu_exception wp 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 pbe syscall nx rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl
xtopology nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est
tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 popcnt aes xsave avx f16c rdrand lahf_lm
ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid
fsgsbase smep erms
configuration: cores=4 enabledcores=4 threads=4
# dmesg | grep -i cpu
[ 0.000000] Initializing cgroup subsys cpuset
[ 0.000000] Initializing cgroup subsys cpu
[ 0.000000] KERNEL supported cpus:
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[ 0.000000] ACPI: SSDT 00000000ddd430f0 005CC (v01 PmRef Cpu0Ist 00003000
INTL 20051117)
[ 0.000000] ACPI: SSDT 00000000ddd436c0 00A92 (v01 PmRef CpuPm 00003000
INTL 20051117)
[ 0.000000] SMP: Allowing 4 CPUs, 0 hotplug CPUs
[ 0.000000] setup_percpu: NR_CPUS:256 nr_cpumask_bits:256 nr_cpu_ids:4
nr_node_ids:1
[ 0.000000] PERCPU: Embedded 27 pages/cpu @ffff88041ec00000 s79616 r8192
d22784 u524288
[ 0.000000] pcpu-alloc: s79616 r8192 d22784 u524288 alloc=1*2097152
[ 0.000000] pcpu-alloc: [0] 0 1 2 3
[ 0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=4,
Nodes=1
[ 0.004588] Initializing cgroup subsys cpuacct
[ 0.004617] CPU: Physical Processor ID: 0
[ 0.004618] CPU: Processor Core ID: 0
[ 0.004623] mce: CPU supports 9 MCE banks
[ 0.004632] CPU0: Thermal monitoring enabled (TM1)
[ 0.064404] CPU0: Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz stepping 09
[ 0.169804] smpboot cpu 1: start_ip = 98000
[ 0.277588] smpboot cpu 2: start_ip = 98000
[ 0.385569] smpboot cpu 3: start_ip = 98000
[ 0.493397] Brought up 4 CPUs
[ 0.541557] ACPI: SSDT 00000000ddbdf018 0083B (v01 PmRef Cpu0Cst 00003001
INTL 20051117)
[ 0.541756] ACPI: SSDT (null) 0083B (v01 PmRef Cpu0Cst 00003001
INTL 20051117)
[ 0.625278] Switched to NOHz mode on CPU #0
[ 0.625319] Switched to NOHz mode on CPU #1
[ 0.625321] Switched to NOHz mode on CPU #3
[ 0.625370] Switched to NOHz mode on CPU #2
[ 0.695683] ACPI: acpi_idle registered with cpuidle
[ 0.927400] cpuidle: using governor ladder
[ 0.927445] cpuidle: using governor menu
[ 14.422362] p4-clockmod: Warning: EST-capable CPU detected. The acpi-cpufreq
module offers voltage scaling in addition to frequency scaling. You should use
that instead of p4-clockmod, if possible.
[10784.296962] p4-clockmod: Warning: EST-capable CPU detected. The acpi-cpufreq
module offers voltage scaling in addition to frequency scaling. You should use
that instead of p4-clockmod, if possible.
[16729.275060] p4-clockmod: Warning: EST-capable CPU detected. The acpi-cpufreq
module offers voltage scaling in addition to frequency scaling. You should use
that instead of p4-clockmod, if possible.
#
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https://bugs.launchpad.net/bugs/797190
Title:
Ubuntu 11.04 Natty upgrade underclocks and disables CPU scaling
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/797190/+subscriptions
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