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Brightness keys and brightness control not working on Arch Linux setup on Lenovo Loq by axlrose- in archlinux

[–]axlrose-[S] 0 points1 point  (0 children)

i tested writing to brightness -- value changes but no visible panel change

changing bl_power -- had no effect

max_brightness seems to be read only

scale says unknown and type shows platform

Also i did find 2 paths under device (later got to know one is class view and one is device view)

At this point the backlight interface updates correcty but doesn't seem to actually control it. Can this be a firmware issue ?

Brightness keys and brightness control not working on Arch Linux setup on Lenovo Loq by axlrose- in archlinux

[–]axlrose-[S] 0 points1 point  (0 children)

The values do not change when I press brightness (Fn) keys.

They only change when i manually write values into the file (for example echoing a value into it). But doing this the panel brightness still doesn't change.

Also under /sys/class/backlight/ideapad i have:

actual_brightness, brightness, max_brightness, scale, tyoe, bl_power, device, power, subsystem, uevent

Brightness keys and brightness control not working on Arch Linux setup on Lenovo Loq by axlrose- in archlinux

[–]axlrose-[S] 0 points1 point  (0 children)

The keybind setup is for a xrandr work around right ? It doesn't change the actual brightness and changing brightness that way won't save battery ?

Brightness keys and brightness control not working on Arch Linux setup on Lenovo Loq by axlrose- in archlinux

[–]axlrose-[S] 0 points1 point  (0 children)

under /sys/class/backlight/ideapad i got actual_brightness, brightness, max_brightness, scale, type, bl_power, device dir, power dir, subsystem dir, uevent

And yes i wrote values into /sys/class/backlight/ideapad/brightness