Brightness set by default to 100% - Not able to keep setting less than 100%

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I updated to the version Red Hat Enterprise Linux 8.7 for workstation. I use a mobile laptop Thinkpad P15 gen 2 - 4K screen. Linux set the brightness by default to 100%. It's to strong for my eyes! The shortkeys Fn+F5 or Fn+F6 work. I see the animation of the sun with the bar increase or decrease. But nothing set the value and nothing append with the brightness. Temporary solution, I use the terminal to set manualy the value: " xrandr --output DP-4 --brightness 0.40 " and work fine. I search a long time how to keep the value to .40 or .50 without result. If I launch NVIDIA settings or other sofwares, he can reset the value to 100% !

I set the policy of SCAP DISA STIG for GUI.

systemctl status systemd-backlight@backlight:nvidia_0.service
● systemd-backlight@backlight:nvidia_0.service - Load/Save Screen Backlight Brightness of backlight:nvidia_0
Loaded: loaded (/usr/lib/systemd/system/systemd-backlight@.service; static; vendor preset: disabled)
Active: active (exited) since Sat 2022-11-12 15:46:01 EST; 44min ago
Docs: man:systemd-backlight@.service(8)
Process: 2049 ExecStart=/usr/lib/systemd/systemd-backlight load backlight:nvidia_0 (code=exited, status=0/SUCCESS)
Main PID: 2049 (code=exited, status=0/SUCCESS)

NVIDIA Driver Version: 515.76
Linux 4.18.0-425.3.1.el8.x86_64 #1 SMP Fri Sep 30 11:45:06 EDT 2022 x86_64 x86_64 x86_64 GNU/Linux

In the past, with the Thinkpad P51 no issue with the brightness.

SR

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