Question Less brightness after unlocking the screen

[NAKA-SAN]

I have an Asus ZenBook 13 OLED (UM325SA) with AMD Ryzen 7 5800U and Windows 10. After locking the screen and turning off the display, the screen appears visibly dimmer when unlocked, even though it shows as "maximum brightness". If I decrease the brightness by one step, the screen immediately becomes brighter. This is a brand-new system set up just yesterday. Whether it’s plugged in or not makes no difference.

What I’ve tried:

• Searched through power modes (only "Balanced" is available) and settings for adaptive brightness, but the option does not exist.
• Disabled Fast Boot.
• Checked AMD Adrenalin for Vari-Bright or Panel Self Refresh, but these options are not available.
• HDR is off.
• Issues with MyAsus can be ruled out, as I haven't installed it at all.
• Firmware, drivers, and software are all up to date.
• UEFI is very limited; I have no options that could affect this issue.

I'm at a loss. Does anyone have any ideas?

 

[Lutfij]

Welcome to the forums, newcomer!

Disabled Fast Boot.
Re-enable it.

Firmware, drivers, and software are all up to date.
Your laptop is on the latest BIOS version?

Manually reinstall the latest chipset drivers sourced from here;
https://www.amd.com/en/support/down...sets/amd-ryzen-and-athlon-mobile-chipset.html

Use DDU to remove all GPU drivers(Intel, Nvidia and AMD) in Safe Mode, then manually install the latest driver sourced from here;
https://www.amd.com/en/support/down...yzen/ryzen-5000-series/amd-ryzen-7-5800u.html
installing in an elevated command, i.e, Right click installer>Run as Administrator.

 

[NAKA-SAN]

@Lutfij thats what i did, yeah.
Everything is the most recent version, sourced directly from AMD and the latest firmware update from ASUS.