Bug 407220

Summary:	SDDM (Breeze theme) crashes when clicking the "Different User" button.
Product:	[Plasma] Breeze	Reporter:	jakob-m
Component:	QtQuickControls	Assignee:	David Edmundson <kde>
Status:	RESOLVED FIXED
Severity:	crash	CC:	nate, simon.vogl
Priority:	NOR
Version:	5.15.4
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:	https://commits.kde.org/plasma-workspace/a282bc9d612a8e325da5206b9d7b1257606b42b9	Version Fixed In:
Sentry Crash Report:
Attachments:	journalctl output

Description jakob-m 2019-05-04 16:46:06 UTC

Created attachment 119843 [details]
journalctl output

SUMMARY
When pressing the "Different User" button SDDM crashes and needs to be restartet.

STEPS TO REPRODUCE
1. Configure SDDM to use the Breeze theme
2. Click on the "Different User" Button.

OBSERVED RESULT
The screen goes to black except for the still working mouse cursor.

EXPECTED RESULT
Being able to select a different user to log in.

SOFTWARE/OS VERSIONS
Linux: Arch linux
(available in About System)
KDE Plasma Version:  5.15.4-1
KDE Frameworks Version: 
Qt Version: 5.12.3-2
SDDN Version: 0.18.1-1


ADDITIONAL INFORMATION
Already posted at SDDM github page but was refered to post again here as it is a fault of the breeze theme and not SDDM itself
https://github.com/sddm/sddm/issues/1162#event-2319107226

Comment 1 Nate Graham 2019-05-09 21:51:47 UTC

Yikes, can reproduce with Qt 5.12.3... but not with 5.12.0.

This points to it being a Qt regression, urgh. Can you please report it to them? Then please paste the URL of the Qt bug report into a comment in this ticket. Thanks!

Comment 2 Simon Vogl 2019-05-17 18:38:29 UTC

Well, I'm having the same issue, I reported it to QT now:
https://bugreports.qt.io/browse/QTBUG-75900

Comment 3 David Edmundson 2019-05-22 01:13:55 UTC

Git commit a282bc9d612a8e325da5206b9d7b1257606b42b9 by David Edmundson.
Committed on 22/05/2019 at 01:13.
Pushed by davidedmundson into branch 'Plasma/5.16'.

Don't assign a QtObject to a model

Summary:
It's a weird thing to do, and that's causing us to hit
https://bugreports.qt.io/browse/QTBUG-75900 when it tries to lookup a
property (icon) that we don't have.

Test Plan: Opened sddm-greeter --test-mode --theme  clicked button

Reviewers: #plasma, fvogt

Reviewed By: fvogt

Subscribers: fvogt, apol, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D21274

M  +10   -3    sddm-theme/Main.qml

https://commits.kde.org/plasma-workspace/a282bc9d612a8e325da5206b9d7b1257606b42b9