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It's been 1 year since I am dual-booting Ubuntu with Windows 10. Learned many beautiful things of Ubuntu yet I am weak in hardware related side. Though in other OS my computer works quiet, fan is always on when using Ubuntu. I just read almost all posts in the forum about this. Installed lm-sensors, psensor, tlp, thinkfan. Changed every single BIOS setting to prefer battery life rather than performance. Tried solutions in this but did not work out, as well. Nothing solved problem. I think I need a hand this time. Just hesitated doing this to prevent causing damage: See the answer part

An observation which might make sense: When I plug out charging cable fan stops generally but I don't know what to do to connect the dots. I can provide any additional detail if you can tell me what to write into terminal or so. Thanks, in advance.

Edit: output of lspci -k | grep -EA3 'VGA|3D|Display'

00:02.0 VGA compatible controller: Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)
    Subsystem: Toshiba America Info Systems Haswell-ULT Integrated Graphics Controller
    Kernel driver in use: i915
    Kernel modules: i915

What I've tried so far:

$ sudo tlp bat
TLP started in battery mode.
$ sudo pm-powersave true
$ sudo gedit /etc/default/grub # Added GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=!Windows 2012"

Answers in this:

Power Savings and Performance Modes on Ubuntu System

Is there a power saving application similar to Jupiter?

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You may be facing a dangerous situation. A large number of Toshiba laptops were sold with batteries that could overheat causing a burn hazard and possibly catch fire. Please for your own safety check to see if you have one of these batteries!

The affected battery packs included in this recall have part numbers that begin with G71C (G71C*******). Part numbers are printed on the battery pack. A complete list of battery pack part numbers included in this recall can be found on Toshiba’s website. The laptops directly affected by the recall, (Portege, Satellite, and Tecra laptops, sold between June 2011 through Nov. 2016.)

Note: Toshiba cautions that other computers may be affected if their owners purchased extra battery packs or had their batteries replaced during servicing.

Edit: If your issue isn't caused by an inflammatory battery your issue is likely being caused by lying to the kernel. issue the command sudo gedit /etc/default/grub and change GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=!Windows 2012" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=Linux"

Edit: Based on your comment regarding Windows it sounds to me like you want to have easy control over performance vs. power saving. See my answer here The choice that corresponds to Windows Battery Optimized is Powersave

Sources:

https://www.cpsc.gov/Recalls/2017/Toshiba-Expands-Recall-of-Laptop-Computer-Battery-Packs

https://consumerist.com/2017/01/04/toshiba-adds-83k-laptop-batteries-to-recall-over-continued-overheating-burn-hazards/

https://help.ubuntu.com/community/BootOptions#Common_Kernel_Options

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