diff --git a/lichee/tools/pack/chips/sun50iw1p1/configs/m64/sys_config_linux-4.9.fex b/lichee/tools/pack/chips/sun50iw1p1/configs/m64/sys_config_linux-4.9.fex
index 75cbef4a28..6dfaba6c3d 100755
--- a/lichee/tools/pack/chips/sun50iw1p1/configs/m64/sys_config_linux-4.9.fex
+++ b/lichee/tools/pack/chips/sun50iw1p1/configs/m64/sys_config_linux-4.9.fex
@@ -550,7 +550,7 @@ lcd_dclk_freq       = 30
 lcd_pwm_used        = 1
 lcd_pwm_ch          = 16
 lcd_pwm_freq        = 50000
-lcd_bl_0_percent   = 50
+lcd_bl_0_percent   = 10
 lcd_pwm_pol         = 1
 lcd_pwm_max_limit   = 255
 lcd_hbp             = 88