Please pass kernel parameter "amdgpu.backlight=0" for workaround.
Kernel bug is already filed, and maintainer is notified: https://bugzilla.kernel.org/show_bug.cgi?id=213715 ** Bug watch added: Linux Kernel Bug Tracker #213715 https://bugzilla.kernel.org/show_bug.cgi?id=213715 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1934557 Title: Backlight (screen brightness) on Lenovo P14s AMD Gen2 inop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1934557/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
