Bightness automatically maxes out

[ojss]

I set the backlight on with the brightness level on 10, after a while of not using the keyboard the backlight is turned off. Upon pressing a key the backlight turns back on but he brightness is automatically set to the maximum possible level. Is this possibly due to gnome?

[luksus42]

I am experiencing the same behavior with manjaro i3. So I don't think, that this is related to the DE. Am Sun, 11 Oct 2020 09:31:39 -0700, Ojas Shirekar schrieb:

…

I set the backlight on with the brightness level on 10, after a while of not using the keyboard the backlight is turned off. Upon pressing a key the backlight turns back on but he brightness is automatically set to the maximum possible level. Is this possibly due to gnome?

-- Gesendet mit Dekko von meinem Ubuntu-Gerät

[ojss]

@luksus42 ahh I see. I am on Manjaro as well, and can't really figure out what is it that is overriding my settings

[pobrn]

I'm experiencing this behaviour as well. I think it is caused by the keyboard backlight controller. This theory is supported by the fact that it also happens with aucc: rodgomesc/avell-unofficial-control-center#36. When I initially wrote the program I found no way to control the timeout or the brightness after that timeout. I cannot promise anything, but I'll try to give it another look if I have time.

[ojss]

Can you guide me as to how I can go around debugging this?

[pobrn]

I have looked into it again not so long ago, and I found nothing promising. Some signs I've encountered may or may not indicate that this timeout is handled somewhere else; possibly in a different chip, which would make adjusting the timeout and whatnot entirely out of scope of this project. Some kind of datasheet/documentation would be the best - I have not tried contacting the manufacturer, but I doubt they would release anything. The second best thing would be finding a "control center" application (for Windows) which can change these things. Otherwise I find it highly unlikely to randomly stumble upon the correct HID feature request (or whatever is necessary to control this aspect of the chip).

[rileyrg]

maybe use xss-lock to catch suspend and to set brightness after.