Article 6CFK2 where is the brighness of backlight saved in Debian

where is the brighness of backlight saved in Debian

by
Ansen
from LinuxQuestions.org on (#6CFK2)
The backlight of my laptop is always at full brightnes after a reboot.
When I execute "sudo /user/lib/systemd/systemd-backlight load backlight:intel_backlight" manully, it works well.
It looks that there is another framework to handle it in kde.
Could someone tell me how to deal it?
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