Ubuntu
linux package

  1. Bug #1822394
  2. Comment #23

Comment 23 for bug 1822394

Revision history for this message
Mario Limonciello (superm1) wrote : Re: [Dell BIOSes dated 27 Mar 2019] laptop keyboard & touchpad not working at gdm screen after boot

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.