Re: MSR_IA32_THERM_CONTROL: 0x0 [Software-controlled clock disabled (full speed)]

[piruthiviraj natarajan <piruthiviraj@xxxxxxxxx>]

On Tue, Jan 28, 2014 at 4:03 AM, Ankur Sinha <sanjay.ankur@xxxxxxxxx> wrote:

On Mon, 2014-01-27 at 21:13 +0530, piruthiviraj natarajan wrote:
> Recently for the past couple of months I have been noticing that when
> I start firefox my system fans go mad and CPU temp rises significantly
> by at least 5Celcius.

I've noticed this too. I haven't yet understood why it happens. I'll
keep an eye out for FF. Here's what I have:

[asinha@ankur-laptop  ~]$ sudo x86info -m

x86info v1.30.  Dave Jones 2001-2011
Feedback to <davej@xxxxxxxxxx>.

Found 4 identical CPUs

Extended Family: 0 Extended Model: 2 Family: 6 Model: 37 Stepping: 5
Type: 0 (Original OEM)
CPU Model (x86info's best guess): Core i7 (Nehalem)
[Clarkdale/Arrandale]
Processor name string (BIOS programmed): Intel(R) Core(TM) i5 CPU
M 560  @ 2.67GHz

Performance MSRs:
  MSR_IA32_PERF_STATUS: 0x15

  MSR_IA32_MISC_ENABLE: 0x850089 [Enabled: TCC PerfMon EnhancedSpeedStep
]

Thermal MSRs:
  MSR_PM_THERM2_CTL: 0x0 [Thermal monitor: 1]
  MSR_IA32_THERM_CONTROL: 0x0 [Software-controlled clock disabled (full
speed)]

  MSR_IA32_THERM_STATUS: 0x88240000

Total processor threads: 4
This system has 1 dual-core processor with hyper-threading (2 threads
per core) running at an estimated 2.65GHz
--

Did anyone try this for power saving?

http://thunderbirdtrr.blogspot.in/2013/06/fedora-power-tweak-suggestion-for-intel.html#.UayL8XzwmV5

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