Ubuntu
libinput package

  1. Bug #1822394
  2. Comment #10

Comment 10 for bug 1822394

Revision history for this message
Joe Barnett (thejoe) wrote : Re: [Dell XPS 15 9575] laptop keyboard & touchpad not working at gdm screen after boot

Perhaps this is somehow related to the convertible lid hinge. Ordinarily when the laptop is in "tablet" mode (hinge open > 180 degrees), the keyboard and touchpad are disabled. Even more reliably than using an external device, switching into and then back out of tablet mode by opening/closing the hinge seems to restore keyboard/touchpad functionality. Not sure why they appear to work until the gdm screen though, or why sometimes using an external device causes them to work again.