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Old 13th July 2012, 11:05 AM
cedrik Offline
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Join Date: Jul 2012
Location: nk
Posts: 2
[ACPI] Heat issue on Intel i5 processor


I have a problem on my new Laptop : Samsung NP530U4B. The processor is an Intel Core i5-2467M. My kernel is 3.4.4-3.fc17.x86_64.
My laptop is overheating and shutdown brutally.

Here is the processor's temperatures on my laptop :

# sensors
Adapter: Virtual device
temp1: +89.0C (crit = +99.0C)
temp2: +29.8C (crit = +99.0C)

Adapter: PCI adapter
temp1: +94.0C

Adapter: ISA adapter
Physical id 0: +89.0C (high = +86.0C, crit = +100.0C)
Core 0: +89.0C (high = +86.0C, crit = +100.0C)
Core 1: +89.0C (high = +86.0C, crit = +100.0C)

In "/var/log/messages", i have multiple errors :

CPU1: Core temperature above threshold, cpu clock throttled (total events = 1)
CPU1: Package temperature above threshold, cpu clock throttled (total events = 1)
mtrr: your CPUs had inconsistent variable MTRR settings
mtrr: probably your BIOS does not setup all CPUs
ACPI Warning: 0x000000000000efa0-0x000000000000efbf SystemIO conflicts with Region \_SB_.PCI0.SBUS.SMBI 1 (20120320/utaddress-251)
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
I have update the BIOS. I have tried to load module "acpi-cpufreq", but the command "modprobe" don't return a message and I don't find the module with command "lsmod".
I have tried to add a CPUFreq Driver (http://docs.fedoraproject.org/en-US/...req_setup.html) but i have'nt the folder "cpufreq"

# ls /lib/modules/3.4.4-3.fc17.x86_64/kernel/arch/x86/kernel/
microcode.ko test_nx.ko

For information, my laptop don't have this problem on Windows, but i have the same problem on other Linux distribution (Ubuntu).

Somebody can help me please.
Thanks a lot !

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Old 13th July 2012, 04:43 PM
george_toolan Offline
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Join Date: Dec 2006
Posts: 2,088
Re: [ACPI] Heat issue on Intel i5 processor

Is your fan working?

Your CPU should automagically scale down when it's idle. You can check with powertop or something like

cat /proc/cpuinfo | grep -i mhz
Which graphics driver did you install?

If you didn't install the ATI proprietary driver you should at least enable power saving for the radeon driver like this: http://wiki.x.org/wiki/RadeonFeature...gement_Options

You might want to disable the radeon chip and use the Intel GPU.
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Old 16th July 2012, 03:53 PM
cedrik Offline
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Join Date: Jul 2012
Location: nk
Posts: 2
Re: [ACPI] Heat issue on Intel i5 processor


I think I have solved my problem. The ATI proprietary driver don't working on Fedora 17, but i have tried this driver on another distribution and i haven't heat issue ! But this laptop have a bad cooling system.
Thanks you for the lead, it helped me to target this problem .

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