When I startup my laptop, before showing the desktop it says:
[FAILED] Failed to start Load/Save Brightness of backlight:acpi_video0.
[FAILED] Failed to start Load/Save Backlight Brightness of backlight:amdgpu_b10.
And my screen brightness is reset to 0 when the computer starts up.
Also, on the Gnome login screen, I have a grey background, instead of the wallpaper I chose for the login screen.
Can anyone help?
When I search this forum I using the errors you posted above I find some posts that might help you with finding a solution. This one seems the most helpfull in your case:
Does help you?
Since you have not posted any information about your system it’s hard for other users to help you