[Linux] Backlight not controllable - fix (Samsung Series 7 Chronos)

I’ve had some difficulties when it came to the backlight on my arch linux installation.
Of course the first place to look for a solution was the arch wiki but I couldn’t find the right combination of kernel params to brighten the screen. It was kind of dark and the other possible mode was completely off.
After searching for a while I found a bug report having the same problem as I had so I had a look at it and checked to see if this works. My expectation was low given the fact that I thought that I’ve already tried everything but fortunately this helped.

Fix:

Add the following line to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and execute update-grub

acpi_osi=linux acpi_backlight=video

Hope this helped you, too 🙂

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