samsung laptop runs hot

English Hardware
1

I have this new samsung 5 series ultrabook with opensuse 12.2 RC1 running on it. First I had it running with 12.1 but 12.2 has better support and also brought the temperature down with some 5 to 10 degrees (C). Now after upgrading to RC1 the temperature went up to the same as before on 12.1. It is not really hot, but doing only some browsing makes it run at around 60 and idle, without anything running will make it run at 52. However when I boot to Windows 7 I will get much lower temperatures, it would idle at 47 and when I run Firefox and watch a video at youtube it will stay easily below 55 degrees.
Somehow in opensuse anything that is done makes the temperatures go up immediately, and whatever I try with cpu governors, shutting down services and stopping apps doesn’t make much of a difference. I tried those advises of Phoronix adding “i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 pcie_aspm=force” to grub but with the current 3.4.4 kernel it doesn’t seem to make any difference.
I am not talking about real overheat issues but a warmth that is not really comfortable and the knowledge that Windows does a better job with the heat so it should be possible in linux too. Anyone has any suggestions?

Btw system consists of NP530U3B with Intel i5 with integrated graphics (no other graphics card) and 8Gb of Ram.

2

Here is good read on kernel power management: GNU/Linux and openSUSE power management regressions - Blogs - openSUSE Forums

Here is a util to set your CPU speed Governor: C.F.U. - CPU Frequency Utilitiy - Version 1.10 - For use with the cpufrequtils package - Blogs - openSUSE Forums

You could always try kernel version 3.5 to see if it makes any difference: S.A.K.C. - SUSE Automated Kernel Compiler - Version 2.75 - Blogs - openSUSE Forums

The newer the kernel, the later and perhaps better driver support that might exist.

Thank You,

3

On 2012-07-28 14:56, dutchkind wrote:
> I have this new samsung 5 series ultrabook with opensuse 12.2 RC1
> running on it. First I had it running with 12.1 but 12.2 has better
> support and also brought the temperature down with some 5 to 10 degrees
> (C). Now after upgrading to RC1 the temperature went up to the same as
> before on 12.1

You could ask about that regression in the beta forum, or better, the factory mail list
(because the devs will see it).

–
Cheers / Saludos,

Carlos E. R.
(from 11.4 x86_64 “Celadon” at Telcontar)

4

I opened a bug report about it but was advised to look in the forums as well. I read many posts here and tweaked my system with pm-profiler and laptop-mode which improved stuff so that I was reasonably satisfied. Idle would come back to 47 just as in windows, etc. But yesterday I updated RC1 to RC2 and it seems I am back at stage 1 again. But I have to investigate if this is really the case or just the high outside temperatures.
I have the RC1 still on a partition and saved ps and powertop output and will do the same in RC2 to see any changes. Somehow I have the feeling it’s the newer intel graphics driver that came with the update as powertop does not really seem to differ that much, which mainly seems to look at cpu activity. How can one know what the GPU does?

5

The ability to read GPU temps depends on the driver installed and that then depends on the brand GPU you have. For instance, if I install the proprietary nVIDIA video driver and use their nvidia-settings program, it tells me what the GPU temperature is. You must find out your GPU brand and what capabilities its driver provides.

Thank You,

6

Remove pcie_aspm=force from grub.

7

Some weeks further, didn’t have much time to look any further. Outside temperatures are around 30 35 C, not really cool, so this may influence the cpu temp as well. Could it be that the fan is running slower in linux than it does in windows? Why is the temperature now always around 54 C when idling with no apps open, and this temp rises with 5 degrees when running only Firefox? It seems so strange not to find some process that needs the processor all the time. I guess I just have to live with it, unless anyone else has a suggestion.

8

I had a separate entry for grub with pcie_aspm=forcebut this didn’t give any difference so I am not using this.

9

I have an integrated intel gpu (3000) that comes with the sandy bridge processor. Searching for temp info doesn’t give me much info.

10

Add Packman repository to Yast. To monitor temp. install “sensors” package.

In addition, try downloading and upgrading to a newer kernel.

11

Hi did you ever get the problem solved ? I have the exact same computer NP530U3B very nice laptop.
also Plugged in or on battery make no difference the icon do not change to battery when not plugged in.

12

Please try a different kernel by adding by right-clicking on this " kernel link ". Add it to the Yast Software Repositories and upgrade the kernel to version 3.6.8.
Provide the latest results.

13

Did that and no change it run at not doing anything or very little

sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +62.0°C (crit = +99.0°C)
temp2: +29.8°C (crit = +99.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +64.0°C (high = +86.0°C, crit = +100.0°C)
Core 0: +63.0°C (high = +86.0°C, crit = +100.0°C)
Core 1: +64.0°C (high = +86.0°C, crit = +100.0°C)

14

Please add this to your Grub kernel options:


acpi_enforce_resources=lax

Reboot your laptop and run sensors.