Need Help: max brighness at 10%

[coffebar]

I believe it's not a problem of brightnessctl, but maybe you can help.

➜  ~ brightnessctl s 1
Updated device 'nvidia_0':
Device 'nvidia_0' of class 'backlight':
	Current brightness: 1 (1%)
	Max brightness: 100

at 1% - real screen brightness is looks like 10%

➜  ~ brightnessctl s 10
Updated device 'nvidia_0':
Device 'nvidia_0' of class 'backlight':
	Current brightness: 10 (10%)
	Max brightness: 100

at 10% - real screen brightness is looks like 100%

➜  ~ brightnessctl s 100
Updated device 'nvidia_0':
Device 'nvidia_0' of class 'backlight':
	Current brightness: 100 (100%)
	Max brightness: 100

at 100%- real screen brightness is looks like 50%

for example "11" looks darker then "1".

Device is a Thinkpad with Nvidia graphics.

/sys/class/backlight/nvidia_0/actual_brightness is changing as expected

Any ideas?

[shashankk90]

This issue may be related to nvidia drivers and not brightnessctl.
Check https://bbs.archlinux.org/viewtopic.php?pid=2072664