I have Lenovo 15ARH05 with Ryzen 7 4800h and the same problem as in bug description. In Fedora 32 with kernel 5.6.6-300 backlight control is fine, even though actual_brightness changes from 514 to 65536. But there is another bug in this kernel, so I updated to 5.8.4-200 and backlight control doesnt work here, actual_brightness just stuck at 311. Checked v5.9-rc4, the only change I noticed is that brightness value restores after reboot if kernel parameter acpi_backlight=vendor is set (but the screen is at its full brightness anyway).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861925 Title: BrightnessOutofRange: Actual brightness for amdgpu_bl0 not in range 0..255 To manage notifications about this bug go to: https://bugs.launchpad.net/pop-os/+bug/1861925/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
