After installing Ubuntu on my Acer Aspire 4830 laptop the CPU is overheating

Question

After I have installed Ubuntu on my laptop Acer Aspire 4830TG my computer is overheating too much and working very slow. I'm guessing is that something makes my computer's CPU overwork or there's some inconsistency with something on my computer. Could you please tell how can I fix this problem?

There are several power management utilities available - I use tlp, and another mentioned often is thermald - both of these are available in the Ubuntu repositories, have you tried either or both? — Charles Green, Jun 16 '17 at 15:46
Well I've tried this program called Bumblebee, which was recommended in several sites, but it doesn't seem to work on mine, so I'm searching for other programs. I will try this tlp or thermald. How can I install it on ubuntu? Do you happen to know the command for it? — Jila Jila, Jun 17 '17 at 17:20
From the command line: sudo apt-get install tlp thermald will install both of them. After install, you should reboot. — Charles Green, Jun 17 '17 at 17:55
Bumblebee is a graphics control utility, used be people with dual graphics cards (Nvidia I believe) to turn off an unused graphics processor. Some information about Bumblebee can be found at https://wiki.ubuntu.com/Bumblebee — Charles Green, Jun 17 '17 at 17:57
You might also review some of the Q&A about bumblebee - it may help with some of the heat issue, but apparently it can be complicated to setup and use. https://github.com/Bumblebee-Project/Bumblebee/wiki/Install-and-usage and https://askubuntu.com/questions/452556/how-to-set-up-nvidia-optimus-bumblebee-in-14-04 would be a good starting place. — Charles Green, Jun 17 '17 at 18:17
Thank you very much for suggesting TLP and Thermald. What about Bublebee, I think it's still useful for my computer coz my computer has a dual graphic card, I believe. — Jila Jila, Jun 18 '17 at 18:38
As I wrote above, it may help - I don't have a dual graphics card, and cannot competently comment on that issue, but you might start a new question about how to use it effectively... — Charles Green, Jun 18 '17 at 18:59

After installing Ubuntu on my Acer Aspire 4830 laptop the CPU is overheating

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