FWIW a few other messages pop up to me in the above logs as suspicious to the described symptoms, especially with keyboard working in cryptsetup.
Mar 31 10:34:45 taplop org.gnome.Shell.desktop[5876]: libinput error: client bug: timer event25 debounce: offset negative (-111ms) Mar 31 10:34:45 taplop org.gnome.Shell.desktop[5876]: libinput error: client bug: timer event25 debounce: offset negative (-44ms) Mar 31 10:34:45 taplop org.gnome.Shell.desktop[5876]: libinput error: client bug: timer event25 debounce short: offset negative (-57ms) When libinput initialized if it failed to configure those input devices, that /might/ explain the behavior. Flipping the hinge will cause them to come on/off the bus and let libinput try again. ** Also affects: libinput (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1822394 Title: [Dell BIOSes dated 27 Mar 2019] laptop keyboard & touchpad not working at gdm screen after boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1822394/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs