<div dir="ltr"><div dir="ltr">> Do you have a reference for the driver default change?<div><br></div><div>Don't got exact reference on specific driver changes right now, cannot speak of an immediate regression but rather seems that kernels before 6.12 had erroneous behaviour according to <a href="https://wiki.archlinux.org/title/Backlight#Backlight_is_always_at_full_brightness_after_a_reboot_with_amdgpu_driver">https://wiki.archlinux.org/title/Backlight#Backlight_is_always_at_full_brightness_after_a_reboot_with_amdgpu_driver</a> , which references <a href="https://bugzilla.kernel.org/show_bug.cgi?id=203905">https://bugzilla.kernel.org/show_bug.cgi?id=203905</a></div><div><br></div><div>Also just saw this <a href="https://wiki.archlinux.org/title/Backlight#Recent_(2025)_AMD_changes">https://wiki.archlinux.org/title/Backlight#Recent_(2025)_AMD_changes</a> which addressed the changes for the brightness values post linux 6.15, will have to install the kernel from backports, check if the proposed patch handles post linux 6.15 brightness values as intended and report back.</div></div></div>