Screen dimmed immediately after updating bios to version F33 (fisrt update from factory version). Disabling secure Boot and enabling legasy support (solution found in an older conversation about the same problem from users updating the same model to older uefi versions) did solve the problem in windows but uefi menu is still very dark. I wonder if anyone has found a better solution? Both windows and nvidia drivers are fully updated.
After updating bios to version f33 (first bios update) the screen immediately went too dark.
Reinstalling bios and updating nvidia drivers had no result. Both windows and all drivers are fully updated. Hard reset had no effect either.
Enabling legasy support in uefi settings (solution given by members facing the same problem a year ago) did fully restored screen brightness in windows but uefi menus remain dark.
After my first post I have contacted local HP support who informed me that it is a known problem and that there is a specific tool that solves it. However the tool is designed for bios version f16 and windows version 1903 and in order to apply it I should return my system to theese earlier versions with accompanying risk of permanent damage. So since I have no problem with the windows they made a case and they advised me to wait for future bios update or creation of tool designed for my current version of bios and windows.
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