This bug is still present in 18.04 LTS. The steps are the same. The startup application workaround #2 in the OP works only temporarily as the permissions on /var/lib/lightdm/.config/dconf/user get reset and the workaround fails.
Switching from lightdm to gdm3 gives you an ugly primitive on screen keyboard but at least they get the coordinates right. This page explains how to switch display manager. https://www.linuxuprising.com/2018/12/how-to-change-default-display- manager.html If you do this on a laptop with an external monitor you will probably run into gdm bug: https://gitlab.gnome.org/GNOME/gdm/issues/372 To get the gdm3 login screen to appear on the proper monitor I used the accepted solution by Aravind here: https://askubuntu.com/questions/1043337/ubuntu-18-04-login-screen- display-settings ** Bug watch added: gitlab.gnome.org/GNOME/gdm/issues #372 https://gitlab.gnome.org/GNOME/gdm/issues/372 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-greeter in Ubuntu. https://bugs.launchpad.net/bugs/1647059 Title: On screen keyboard partially clipped or completely off screen Status in unity-greeter package in Ubuntu: New Bug description: The on screen keyboard is too low and partially clipped or completely off the bottom of the screen. On a laptop with a 2000 pixel high built-in screen with the lid closed and connected to a 1080p hdmi tv. The built-in screen is turned off in the display settings in case that's relevant. Replication steps 1) Turn on the on screen keyboard and log in using it 2) Logout or reboot 3) Lightdm remembers that the on screen keyboard is on and tries to display it = Lightdm displays the on screen keyboard using the size of the unused 2000 pixel high screen for alignment instead of the 1080 high screen in use. Only the top of the keyboard is visible at the bottom of the screen. If lightdm is configured to use 720p then the on screen keyboard is completely clipped and invisible. The problem only occurs when lightdm remembers that the on screen keyboard is on. Turning it on manually correctly displays it at the bottom of the screen. Toggling a misplaced keyboard off and back on unfortunately doesn't fix the problem. Workaround 1 When logging in, after typing password, turn off the on screen keyboard and click the small login arrow instead of clicking the on screen enter key. Each time logging in you'll need to turn the on screen keyboard on and off again. Turning off an invisible/clipped keyboard and rebooting will temporarily fix the problem. Workaround 2 Dangerous hack. Run a script to turn off the on screen keyboard in lightdm's dconf database. To make this script run as a startup application the sudo commands need to be removed and the lightdm group membership given to the user running it as well as r/w access to /var/lib/lightdm/.config/dconf/user. #!/bin/bash sudo cp /var/lib/lightdm/.config/dconf/user ~/.config/dconf/lightdm printf %s\\n "user-db:lightdm" > ~/db_profile_lightdm export ONSCREEN_KBD=$(DCONF_PROFILE=~/db_profile_lightdm dconf read /com/canonical/unity-greeter/onscreen-keyboard) #echo 'ONSCREEN_KBD=' $ONSCREEN_KBD if [ "$ONSCREEN_KBD" != "false" ]; then DCONF_PROFILE=~/db_profile_lightdm dconf write /com/canonical/unity-greeter/onscreen-keyboard false sudo cp ~/.config/dconf/lightdm /var/lib/lightdm/.config/dconf/user fi rm -f ~/db_profile_lightdm ~/.config/dconf/lightdm exit 0 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lightdm 1.10.6-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7 Uname: Linux 3.13.0-37-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.21 Architecture: amd64 CurrentDesktop: Unity Date: Sat Dec 3 09:16:31 2016 InstallationDate: Installed on 2014-07-09 (877 days ago) InstallationMedia: sonar 13.10 - Release amd64 SourcePackage: lightdm UpgradeStatus: Upgraded to trusty on 2014-07-09 (877 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity-greeter/+bug/1647059/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
