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I have installed Ubuntu 12.04 in my XPS L502. Everything works fine except the system heat. I can feel that the laptop heat rises more and fan sound also, when I am using ubuntu. But with Windows 7 that came pre-installed with laptop heat is normal. I like to use Ubuntu on this laptop, but because of this reason I am not able to do that. Please help.

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I had the same problem. I solved it by installing Bumblebee.

It seems like it was a problem with power management. After installing Bumblebee and restarting my computer, it ran smoothly, with quiet fan and at normal temperature. Actually, now my battery last longer in Ubuntu than it does on Windows 7.

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Thanks it solved my problem – santosh Jul 21 '12 at 15:54

You might use cpufrequtils to reduce the CPU frequency or cpufreqd to adjust that frequency depending on system load, active processes, temperature and so on. In case that cpufreq-info from cpufrequtils reports the governor ondemand and high frequencies, you might want to use top to see where that demand comes from, i.e. which processes keep the CPU busy.

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by this how can i reduce the head and fan sound... – santosh Jun 28 '12 at 15:32
The lower the frequency of your CPU cores, the less power it consumes, the less heat it generates. – MvG Jun 28 '12 at 15:48
I installed Bumblebee and now the cpu frequency reduced and it solved the heat generation problem.Thanks... – santosh Jul 21 '12 at 15:53

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