If you are using radeon graphics or any other dedicated AMD graphics card with Intel Graphics in your laptop, you might have encountered a problem of overheating and lesser battary life. You can shut down AMD graphics card permanently and let Intel Graphics card work and solve these two problems. In my case, I have a HP Pavilion G6 with AMD radeon 6470M and I also faced that situation. So I run following commands and shut down AMD graphics card. Now my overheat problem is solved and my battary life became normal.
Run followings in terminal
sudo chown -R username:username #replace 'username' with your username
sudo -s
echo off /sys/kernel/debug/vgaswitcheroo/switch
To run this in every startup, open /etc/rc.local file,
sudo nano /etc/rc.local
Include echo off /sys/kernel/debug/vgaswitcheroo/switch in that file before exit statement.
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