Upgraded to 4.15.0-42 kernel from proposed. And this issue is still exist. And the default value is 12, but the max is 255.
$ cat /sys/class/backlight/amdgpu_bl0/brightness 12 $ cat /sys/class/backlight/amdgpu_bl0/max_brightness 255 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1802834 Title: Dim screen after first boot on Thinkpad A285 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1802834/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
