# What can I do to prevent Ubuntu from overheating my Notebook?

I have an easynote tj65 (2.1 ghz dual core with Geforce GT240M) running Ubuntu 11.10 and Windows 7 in dual-boot-mode.

While Windows 7 doesn't have any comparable issues, Ubuntu is making my notebook warmer and warmer once the CPU-usage of all processes together gets higher than 50-60 percent, which happens as soon as I do anything more than simple browsing, e.g. starting and running banshee. After starting with no other processes running and (cpu-usage: ~1%) the temperature of both cores is at 61 degrees.

Once it got to 50 percent cpu usage it rises to around almost 90 for both cores (gpu rises to the same level according to psensors). Sensors tells me that 98 is the critical temperature for my cpu model and i think around 90 is far too close, especially if I'm not doing anything special. The system crashes pretty quickly once my average cpu usage gets beyond 60%.

It also seems like the fan is not as loud as at system startup as it could be in windows while playing graphic-intensive games for example.

And yes: I cleaned my fan! And no: I can't change anything in my BIOS regarding the fan or CPU.

I hope you can help me -- like this, it is impossible to use the Ubuntu notebook as a productive system.

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Hi and welcome to AskUbuntu - please can you edit into you question details of your graphics card together with any graphics drivers you are using. –  fossfreedom Oct 23 '11 at 22:33
I finally found a solution: webupd8.org/2011/09/jupiter-applet-finally-available-for.html Download and install this and activate battery-saving-mode. If it was due to this bug: techytalk.info/… then this is another workaround for it. It seems like in its natural state, that ubuntu always run in some kind of maximum performance-mode, at least on some machines. Like mentioned in the other thread Jupiters Power-Safe-Mode is a good way to keep your CPU temperature low. I havent done excessive testing yet though. –  Johannes Oct 24 '11 at 3:45

According to previous posts here, a known bug in the Linux kernel is leading to overheating issues: Heat issues on 11.10 beta?

Recent releases (11.04 also) have had a similar problem. A workaround for the Linux 3.0 kernel has been suggested:

http://www.techytalk.info/linux-kernel-2-6-38-2-6-39-power-regression-workaround/

I've heard that these issues were supposed to be fixed completely in Linux 3.1. However, Ubuntu 11.10 uses the 3.0 kernel, so the above workaround should still be relevant. According to Phoronix, the power consumption of Ubuntu 11.10 is up as much as 50%:

http://www.phoronix.com/scan.php?page=news_item&px=OTg5Mg

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arg. comments are messed up. tried to fix it but failed.. –  Johannes Oct 24 '11 at 3:47
Wahat i wanted to say to you was: The workaround is not working for me as it produces following error -bash: echo: Schreibfehler: Die Operation ist nicht erlaubt. (Write Error: Operation not allowed) on the command echo powersave > /sys/module/pcie_aspm/parameters/policy But I found another solution: webupd8.org/2011/09/jupiter-applet-finally-available-for.html Download and install this and activate battery-saving-mode. –  Johannes Oct 24 '11 at 3:48

You can try to use the cpu-freq indicator app and force Ubuntu to to run at lower speeds.

Add this PPA: ppa:artfwo/ppa, and install the package indicator-cpufreq.

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cpu-freq indicator seems do have no effect at all on my machine. is it capable of running on its own or do i need another package for that? –  Johannes Oct 24 '11 at 3:35
u should get an indicator select that pick the lower cpu freq if that helps –  sarveshlad Oct 24 '11 at 4:23

You could try to open the terminal, then run

\$ gksudo gedit /etc/default/grub


and in the line that says:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"


change it for:

GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi=Linux quiet splash"


then save and restart. I hope this would solve the problem.

Thereafter, install bumblebee.

http://www.ubuntugeek.com/install-bumblebee-in-ubuntu-12-1012-04-using-ppa.html

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Many new fixes and power management enhancements have gone into 12.04 / 12.10 and especially the new Nvidia drivers to handle your graphics power management that little bit better as well. Also by running Xubuntu you forego the 3D desktop environment for a 2D one which also helps reduce power usage levels.

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