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I'm using dual boot with Windows 8 and Ubuntu 12.04. When I use Windows 8, everything works perfectly but when I use Ubuntu 12.04 my CPU heats up too quickly.

Why does it happen only in Ubuntu and not in windows and what can I do to prevent it.

Thanks!

My computer: HP ProBook 4540s

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Many friends of mine have the same issue. I guess Ubuntu doesn't have a power management system like windows does, – Shagun Nov 29 '12 at 13:09
It does and its actually part of the kernel for a long time. Mostly these are issues caused by the graphics GPU and not the CPU and that is managed by the display driver in use. – Bruno Pereira♦ Nov 29 '12 at 13:37
Can you feel the heat or is it just the fans are on? I ask because I have a Probook 4510s and it's fan are always on full after I wake the computer from sleep, it's a known bug and has been around for ages. theres a bug report here bugs.launchpad.net/ubuntu/+source/linux-source-2.6.17/+bug/… – Stephen Martin Dec 23 '12 at 13:08

2 Answers

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Install your display driver....

I have the same laptop with AMD Radeon HD 7650M 1GB VGA. Go to the System Settings> Additional Drivers, and install the graphics diver, if you are using AMD hardware like me.

This should work also if you have a Nvidia card.

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Indeed there is a driver, but when I install it I won't be able to use GNOME3 full \ Unity 3D.. – user1798362 Dec 1 '12 at 19:06
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Turning off switchable graphics in BIOS should make your laptop run cooler and double the battery life.

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