Hi, im edting /etc/grub file, in tihs line; GRUB_CMDLINE_LINUX=
ı added amdgpu.backlight=0
and enter this command
sudo grub2-mkconfig -o /boot/grub2/grub.cfg
its worked. check more AMD Ryzen 4800H Renior iGPU backlight brightness control not working (Hybrid Graphics) (Lenovo Legion 5 15ARH05) (#1438) · Issues · drm / amd · GitLab
thanks for answers