Public bug reported:

On a dell XPS 15 2-in-1 with the latest 1.4.0 bios, my touchpad and keyboard 
are unresponsive at the gdm login screen.  Keyboard works to unlock encrypted 
harddrive before that though.  If I plug in a USB keyboard or activate my 
bluetooth mouse, I can use those to log in, and then after logging in the 
laptop touchpad and keyboard work again.  Logging out of the desktop results
in the laptop touchpad and keyboard working on the gdm screen.  Did not see 
this behavior before upgrading from 1.2.0 bios to 1.4.0 bios, but also had
not rebooted in a while, so not sure if bios or package upgrades triggered 
this behavior.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: gdm3 3.32.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
Uname: Linux 5.0.0-8-generic x86_64
ApportVersion: 2.20.10-0ubuntu23
Architecture: amd64
CurrentDesktop: GNOME
Date: Fri Mar 29 17:51:00 2019
InstallationDate: Installed on 2018-09-26 (184 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: gdm3
UpgradeStatus: Upgraded to disco on 2019-03-11 (18 days ago)

** Affects: gdm3 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug disco wayland-session

** Description changed:

- On a dell XPS 15 2-in-1 with the latest 1.4.0 bios, my touchpad and
- keyboard are unresponsive at the gdm login screen.  Keyboard works to
- unlock encrypted harddrive before that though.  If I plug in a USB
- keyboard or activate my bluetooth mouse, I can use those to log in, and
- then after logging in the laptop touchpad and keyboard work again.
+ On a dell XPS 15 2-in-1 with the latest 1.4.0 bios, my touchpad and keyboard 
are unresponsive at the gdm login screen.  Keyboard works to unlock encrypted 
harddrive before that though.  If I plug in a USB keyboard or activate my 
bluetooth mouse, I can use those to log in, and then after logging in the 
laptop touchpad and keyboard work again.  Logging out of the desktop results
+ in the laptop touchpad and keyboard working on the gdm screen.  
  
  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: gdm3 3.32.0-1ubuntu1
  ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
  Uname: Linux 5.0.0-8-generic x86_64
  ApportVersion: 2.20.10-0ubuntu23
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Mar 29 17:51:00 2019
  InstallationDate: Installed on 2018-09-26 (184 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  SourcePackage: gdm3
  UpgradeStatus: Upgraded to disco on 2019-03-11 (18 days ago)

** Description changed:

  On a dell XPS 15 2-in-1 with the latest 1.4.0 bios, my touchpad and keyboard 
are unresponsive at the gdm login screen.  Keyboard works to unlock encrypted 
harddrive before that though.  If I plug in a USB keyboard or activate my 
bluetooth mouse, I can use those to log in, and then after logging in the 
laptop touchpad and keyboard work again.  Logging out of the desktop results
- in the laptop touchpad and keyboard working on the gdm screen.  
+ in the laptop touchpad and keyboard working on the gdm screen.  Did not see 
+ this behavior before upgrading from 1.2.0 bios to 1.4.0 bios, but also had
+ not rebooted in a while, so not sure if bios or package upgrades triggered 
+ this behavior.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: gdm3 3.32.0-1ubuntu1
  ProcVersionSignature: Ubuntu 5.0.0-8.9-generic 5.0.1
  Uname: Linux 5.0.0-8-generic x86_64
  ApportVersion: 2.20.10-0ubuntu23
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Mar 29 17:51:00 2019
  InstallationDate: Installed on 2018-09-26 (184 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180725)
  SourcePackage: gdm3
  UpgradeStatus: Upgraded to disco on 2019-03-11 (18 days ago)

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https://bugs.launchpad.net/bugs/1822394

Title:
  laptop keyboard & touchpad not working at gdm screen after boot

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