My monitor gets heated only in Chakra?

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http://chakra-project.org – I'm going to report something very strange.When I'm some time using my PC, my monitor gets heated. It only happens to me on Chakra, I've used some time Ubuntu and that doesn't happened. I have an ATI Radeon 4300 running with free drivers (all distros use it) and a Samsung SyncMaster P2050 monitor. I'm getting crazy or this is possible to happen? Get heated only in Chakra? (HowTos)