Asus Eee Pc X101ch and Intel Atom: Get A Precise Brightness Control!

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sebastjava
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Asus Eee Pc X101ch and Intel Atom: Get A Precise Brightness Control!

Post by sebastjava » Thu Feb 22, 2018 1:47 am

This is just a part of a group of short tutorials:

Asus Eee Pc X101ch and Intel Atom: Start With Linux Mint Mate!

Asus Eee Pc X101ch and Intel Atom: Fix The Speaker And Microphone!

Asus Eee Pc X101ch and Intel Atom: Get A Suitable Video Playback!

Asus Eee Pc X101ch and Intel Atom: Get A Precise Brightness Control!

Asus Eee Pc X101ch and Intel Atom: Get Those Missing Blue Function Keys!

Remember: I strongly recommend you Start With Linux Mint Mate! Some of the things described here will only work with Linux Mint Mate. But some others could also be useful on other systems.


Fix The Brightness Control Keys

Reduce or increase the brightness of your screen, using the special keys. Did you find something strange? It goes down or up two steps at a time, with a 1/4 second interval. It's not a big deal but it doesn't look very clean and it lacks some precision. The problem here is that both MATE-power-manager and ACPI's backlight management are acting here. So we just need to deactivate one of them. We will deactivate acpi_backlight since MATE-power-manager already does that job and adds an On Screen Display (OSD).

Just add this to your Kernel Boot Parameters:
acpi_backlight=none (no spaces; exact typing!)
You must TEST IT first, then make it permanent. Follow these instructions on how to change your Kernel Boot Parameters:
https://wiki.ubuntu.com/Kernel/KernelBootParameters

You will get:
  1. Precise screen brightness control via keyboard.
  2. OSD still working.
  3. Brightness settings "remembered" from last session (after login screen at 100% brightness).

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