暗影精灵8 ubuntu20.4无法调节屏幕亮度

cd /sys/class/backlight/nvidia_0
ls

actual_brightness  device          scale      uevent
bl_power           max_brightness  subsystem
brightness         power           type

cat /sys/class/backlight/nvidia_0/max_brightness
cat /sys/class/backlight/nvidia_0/brightness
su
echo your_bightness_value > /sys/class/backlight/nvidia_0/brightnes