Bug 1654446

Summary:	Timedlogin fails when userlist is disabled after upgrading from RHEL 7.5 to 7.6
Product:	Red Hat Enterprise Linux 7	Reporter:	tfahl
Component:	gnome-shell	Assignee:	Florian Müllner <fmuellner>
Status:	CLOSED WONTFIX	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	7.6	CC:	bobd, David.M.Cooke, jadahl, tfahl, tpelka
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:
Clones:	1668895 (view as bug list)		Environment:
Last Closed:	2021-03-15 07:31:47 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1668895

Description tfahl 2018-11-28 20:06:24 UTC

Description of problem:
After upgrading from RHEL 7.5 to 7.6 the TimedLogin option for gdm is no longer working. The error only occurs when the user list is disabled. With the user list enabled Timedlogin works for users on the user list. 

Version-Release number of selected component (if applicable):
RHEL 7.6 
gdm-3.28.2-10.el7.x86_64
gnome-desktop3-3.28.2-2.el7.x86_64
gnome-shell-3.28.3-6.el7.x86_64

How reproducible:
Always reproducible

Steps to Reproduce:
1. Setup the Timedlogin option in /etc/gdm/custom.conf
[daemon]
TimedLoginEnable=true
TimedLogin=USER
TimedLoginDelay=10

2. Add dconf settings to disable the userlist on the login screen
Create the file: /etc/dconf/db/gdm.d/00-login-screen and add these options:

[org/gnome/login-screen]
disable-user-list=true

Update dconf via 'dconf update'

3. Restart gdm via 'systemctl restart gdm.service'

Actual results:
The user never logs in

Expected results:
After a timeout of 10 seconds the specified user is logged in.

Additional info:

The following error can be seen in journalctl

gnome-shell[36678]: JS ERROR: Exception in callback for signal: release: TypeError: this._timedLoginItem is null                                              _showTimedLoginAnimation@resource:///org/gnome/shell/gdm/loginDialog.js:1003:9                                               wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                             run@resource:///org/gnome/shell/gdm/batch.js:64:20                                             wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                             runTask@resource:///org/gnome/shell/gdm/batch.js:144:16                                            wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                             process@resource:///org/gnome/shell/gdm/batch.js:210:19                                             wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                              nextTask@resource:///org/gnome/shell/gdm/batch.js:161:9                                             wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                             process@resource:///org/gnome/shell/gdm/batch.js:222:12                                             wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                            nextTask@resource:///org/gnome/shell/gdm/batch.js:161:9                                              wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                             process/signalId<@resource:///org/gnome/shell/gdm/batch.js:217:16                                              _emit@resource:///org/gnome/gjs/modules/signals.js:128:27                                               release@resource:///org/gnome/shell/gdm/batch.js:102:13                                            wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22                                          _blockTimedLoginUntilIdle/this._timedLoginIdleTimeOutId<@resource:///org/gnome/shell/gdm/loginDialog.js:1022:17

Comment 2 Bob Dingman 2019-06-28 13:12:30 UTC

I encountered this as well but had not discovered the dependence on the login-screen "disable-user-list=true" setting. Thank you for posting!

It was confusing because AutomaticLogin still works (i.e., with RHEL 7.6 with the login-screen "disable-user-list=true" setting.)

Comment 5 RHEL Program Management 2021-03-15 07:31:47 UTC

After evaluating this issue, there are no plans to address it further or fix it in an upcoming release.  Therefore, it is being closed.  If plans change such that this issue will be fixed in an upcoming release, then the bug can be reopened.