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Backlight control in RHEL8.4

We are trying to adjust the backlight in RHEL 8.4,

but we do not see any changes on the screen.

While debugging, we noticed that the asus-nb-wmi module is used by default.

When we blacklist the asus-nb-wmi module, the backlight adjustment switches to using Intel drivers.

To address this, we tried adding the option "acpi_backlight=vendor" and ran "grub2-mkconfig -o /boot/grub2/grub.cfg" to update the configuration, but it did not work.

Could someone assist with this issue?

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