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How can I improve overall system performance?

I have a i3 laptop with Ubuntu 11.10(64bit) and the boot last 30-40 seconds.... how can I make it faster? Also my laptop is just 5-6 mounths and my battery last only 2h 2h 20min with jupiter and the brightness at the minimum level can anyone help?

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Kind of related askubuntu.com/q/2194. Some answers may help, as disabling unused programs at startup. –  Decio Lira Nov 7 '11 at 23:42
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marked as duplicate by fossfreedom Jun 22 '12 at 20:54

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3 Answers

Try out lubuntu, faster boot up time and less CPU intensive, lengthening battery life and shortening boot time. See lubuntu.org for more information.

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but I really like Unity.... and I think lubuntu is a bit essential but witout any eye-candy.... The battery problem is a kernel problems so I need a program to do that.... Also the boot time is very very slow(35 seconds) it's not possible.... –  Orestis Nov 8 '11 at 5:43
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Install "powertop" (which you may find in the Ubuntu Software Centre.

It is a command-line utility, which you may find difficult to use, but if you find some tutorials, you could tweak things in your hardware to expend less battery charge.

In my case, I improved from 1:30 hours of charge at common use (surfing the web, mid-brightness), up to 2:20 hours of charge.

Good luck ;)

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If you want to extend the battery life, try the recommendations in the following Wiki

https://wiki.ubuntu.com/Kernel/PowerManagement/PowerSavingTweaks

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