#Stuck at max brightness

8 messages · Page 1 of 1 (latest)

pastel inlet
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I followed the given from the arch wiki backlight (because I have a Nvidia and AMD gpu on my laptop) , and gave the kernel parameter "acpi_backlight=video" in the etc/default/grub. The brightness is now un-adjustable and stuck at max.
I can remove the kernel parameter but then the brightness is too low (still adjustable but the max is still very dull). I don't have problem with it being stuck on max but it would be nice to adjust as it may hurt my eyes if I suddenly look into the screen. Also I do not have "nomodeset" in the kernel parameters in etc/default/grub. I also tried giving all the other 3 kernel parameters but the brightness can still not be adjusted.

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mellow jasper
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How are you attempting to adjust the brightness?

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I mean are you using special brightness function keys on your keyboard? Or through some sort of GUI? or through the terminal?

pastel inlet
mellow jasper
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If you manually edit the /sys/class/backlight/acpi_video0/brightness file, does brightness change accordingly? You might need sudo

pastel inlet
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but when i remove the kernel paramter, the backlight uses my amd gpu and so the name of the folder then is amdgpu something, and this method of changing brightness works then!

pastel inlet