> How could we confirm AMD laptop supports custom brightness curve (look in kernel log)? From the 'backlight' keyword, I only got these logs below.
Custom brightness curve starts with 6.15 (it hasn't been backported). But here is how you tell: ❯ sudo dmesg | grep custom [ 5.436063] amdgpu 0000:c1:00.0: amdgpu: [drm] Using custom brightness curve However the reason that this needs to be backported now is because adaptive backlight modulation (panel power savings) has the same effect that user requested brightness doesn't equal actual brightness. You can discover that this feature is enabled by this sysfs file. /sys/class/drm/card0-eDP-1/amdgpu/panel_power_savings -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2110585 Title: [SRU] Stop using 'actual_brightness' in systemd To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/2110585/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
