Lock screen does not unlock with valid password if non-english keyboard layout was selected before screen was locked

Bug #1796888 reported by Elizabeth on 2018-10-09
This bug affects 4 people
Affects Status Importance Assigned to Milestone
gnome-screensaver (Ubuntu)

Bug Description

The bug could be reproduced the following way:
1) Select EN keyboard layout - Lock the screen - Enter the valid password - Success
2) Select other keyboard layout (RU in my case) - Lock the screen - Enter the valid password (lock screen shows that EN layout is used) - Password is not accepted

Keyboard shortcuts for input source switch does not work properly when the screen is locked.
Also, I tried to switch input source with the button displayed in the lock screen - it shows as if the input source was changed, but it does not produce any effect, the password is still rejected. Also, have checked that the Caps lock is switched in the proper position.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-screensaver 3.6.1-8ubuntu3
ProcVersionSignature: Ubuntu 4.15.0-36.39-generic 4.15.18
Uname: Linux 4.15.0-36-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.4
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 9 15:55:06 2018
InstallationDate: Installed on 2018-09-04 (34 days ago)
InstallationMedia: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
SourcePackage: gnome-screensaver
Symptom: security
Title: Screen locking issue
UpgradeStatus: Upgraded to bionic on 2018-10-08 (1 days ago)

Elizabeth (ms-lilibeth) wrote :
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in gnome-screensaver (Ubuntu):
status: New → Confirmed

This bug affect me too - can't enter correct password in gnome-screensaver. I'm using lightdm for login, if it matters

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