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Linux kernel regression on power usage

I just installed 11.10 64bit on my Win 7 laptop but instantly i realized how hot the laptop become when i run Ubuntu. I sometimes have to boot into Windows just to cool down the laptop.

I read this was a common problem with 11.10 and that there is kernel bug( like i said i read from somewhere)

How do I solve this heating problem as clearly it has nothing to do with hardware as Windows 7 runs quite cool but 11.10 always give a massive temperature hike (not less than 55 degrees)

My Rig: HP Pavilion DV 6700 Win 7/11.10 64 bit dual boot Intel 965/ x3100 Intel Core Duo 2.0 Ghz 4gb RAM

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I would also like to know if there is a solution. My laptop is running EXTREMELY hot under Ubuntu 11.10 – beanaroo Oct 18 '11 at 14:54
I am now stuck with Windows 7 as i just can't use this in such a state please Canonical FIX IT. I had wanted to show Ubuntu ro my friends. But not in this state – Mysterio Oct 18 '11 at 14:59
ATI graphics card? – Bruno Pereira Oct 18 '11 at 15:23
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Same here. I just ended up using Elementary OS (based on Ubuntu 10.10). Problem occurs from Linux kernel version 2.6.37 and will eventually kill the laptop battery, or at least that's what happened to me. Could you mark this bug report as "Affecting you"? The more people are affected, the higher the bug's priority. bugs.launchpad.net/ubuntu/+bug/858916 – RobinJ Nov 12 '11 at 18:44
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Aha my favorite helper Jorge Castro. I will do that – Mysterio Nov 12 '11 at 22:10
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closed as exact duplicate by jrg, Marco Ceppi Nov 18 '11 at 20:17

This question covers exactly the same ground as earlier questions on this topic; its answers may be merged with another identical question. See the FAQ for guidance on how to improve it.

2 Answers

up vote 2 down vote accepted

Another "solution" for this problem can be found in the following link:

http://www.omgubuntu.co.uk/2011/11/linux-power-regression-overheating-problem-on-thinkpad-fixed

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Adding the following through Grub on an Intel video-based laptop, a Toshiba Satellite with an Intel GMA 4500, using both 11.10 and 12.04, completely fixed its overheating issue, which, as was pointed out earlier, occurs very fast at startup without actually doing anything. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\"Linux\" pcie_aspm=force acpi=noirq i915.i915_enable_rc6=1" – user38220 Jan 2 at 8:00
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A temporary solution to this is the use of some tool that allow you to reduce the CPU clock, like CPUFreq or Jupiter.

CPUFreq installation instructions: List of Application indicators

Jupiter installation instructions: http://www.webupd8.org/2011/10/things-to-tweak-after-installing-ubuntu.html

Another possible solution is the activation of the active-state power management through GRUB (I don't know if it works with Kernel v3).

For this solution, refer to http://www.webupd8.org/2011/06/linux-kernel-power-issue-fix.html.

If you want to monitor your CPU temperature I suggest using the indicator-sensors:

sudo add-apt-repository ppa:alexmurray/indicator-sensors
sudo apt-get update
sudo apt-get install indicator-sensors

Regards,

Rafael

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+1 for active-state power management. Though, if you notice problems after this option then revert it. – alex Oct 18 '11 at 15:29
Is this heating problem a bug with the kernel or what? I know of the webup8 tweaks but when will Canonical fix it – Mysterio Oct 18 '11 at 15:40
Is reducing clock frequency not harmful to a laptop? – beanaroo Oct 19 '11 at 15:28
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