The built-in keyboard on my "HP Pavilion 11 x360 PC" stops working in the graphical login under kernel 5.4.0-45-generic on Ubuntu 20.04.1 LTS (Focal Fossa). Booting to the previous kernel (5.4.0-42-generic) works fine. Booting back to 5.4.0-45 breaks it again. I tried running "sudo update-initramfs -u" and "sudo update-grub". An external USB keyboard works under both kernels, but this defeats the purpose of a notebook computer.