[HOWTO] Adjust the screen backlight (nVidia)

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tome
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[HOWTO] Adjust the screen backlight (nVidia)

Post#1 by tome » 25 Aug 2013, 15:52

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).
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hope
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[HOWTO] Adjust the screen backlight (nVidia)

Post#2 by hope » 04 Jul 2020, 17:25

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.
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