Brightness slide to highest automatically

My laptop (dell latitude 7285) screen backlight always gradually rise in brightness to maximum. The manual setting is works fine by the way.
This device only has a intel HD Grapics 615 and no ambient light sensor. In Clear Linux I can’t find any option to disable automatic brightness in gnome. Is there any way to disable this dynamic control ?

Information add: maybe it’s not about an ambient light sensor which not exist.
I found a ALS device in /sys/bus/iio even this laptop doesn’t have this kind of hardware. I disabled its kernal module In modprobe. After reboot that “void” device disappear in filesystem but nothing change with this issue . The brightness still increase. No matter what I do manually with GUI or configuration file.