[HOWTO] Adjust the screen backlight (nVidia)

[tome]

Add the following kernel parameter in your bootloader:

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acpi_backlight=vendor

and set your brightness with:

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echo 100 > /sys/class/backlight/nv_backlight/brightness

replace 100 with number 1 - 100 (don't use 0).

[hope]

Thanks for the excellent code! The same code works for me without putting any parameter inside a bootlader, I just used

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echo 200 > /sys/class/backlight/intel_backlight/brightness  

command works. Actually I used more than 100 without any problems since 100 makes my screen relatively darker than I expected. Maybe vendor to vendor limits changes ? Actually there is a file under which shows the maximum brightness value under the same folder which is max_brightness. I think you can increase the value 1 less than the that maximum value in safety.

[hope]

Actually,

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xrandr --output <screen-name> --brightness 0.5

will do the same job. (0.5 at the reduces backlight to 50 percent and you can find your screen-name by typing xrandr. Just before command itself, there are the name of the connectors which are your sceen-names, select the connected ones).