I believe I have a workaround provided by a kernel engineer I was discussing the issue with.
Adding the following to the kernel boot options resulted in the keyboard and touchpad working without issue: i8042.nomux=1 i8042.reset It appears that Dell uses i8042 to emulate a ps/2 interface rather than using USB for the built-in keyboard and touchpad. The following stackexchange link provided more info: https://unix.stackexchange.com/questions/28736/what-does- the-i8042-nomux-1-kernel-option-do-during-booting-of-ubuntu I've attached a new dmesg output from a successful boot using these boot options[0] [0] boot_i8042_options_keyboard_usable_dmesg.log ** Attachment added: "dmesg i8042 boot options keyboard usable" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1822394/+attachment/5280162/+files/boot_i8042_options_keyboard_usable_dmesg.log -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libinput in 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 _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
