Bug 461176

Summary:	Applications don't prompt to save unsaved work when logging out on Wayland, causing data loss
Product:	[Plasma] plasmashell	Reporter:	John Brooks <john>
Component:	Session Management	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	CONFIRMED ---
Severity:	critical	CC:	alex765, butirsky, christian.rohmann, fedin-ilja2010, freisim93, hoperidesalone, hubert.ziebicki, jlp, kde-01, L.Bonnaud, miranda, nate, plasma-bugs, postix, tbondvagyok, tobi.goergens, whyhow3.141
Priority:	NOR	Keywords:	usability, wayland
Version:	master
Target Milestone:	1.0
Platform:	Archlinux
OS:	Linux
Latest Commit:		Version Fixed In:

Description John Brooks 2022-10-29 22:30:38 UTC

SUMMARY
When logging out of a Wayland session, applications do not display prompts to save unsaved work before proceeding with logging out.


STEPS TO REPRODUCE
1. Log in to a Wayland session
2. Open Kate, type some stuff, do not save it
3. Log out of the Wayland session

OBSERVED RESULT
The session ends and unsaved work is discarded with no prompts to save it first

EXPECTED RESULT
Applications should be able to ask to save work before logging out under Wayland, like they do under X11.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 5.26.2
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6
Graphics platform: Wayland

ADDITIONAL INFORMATION
I have been told that this is due to Wayland not having an API to tell applications that the session is ending. I'm not sure what is done on X11, or if there are any relevant protocol proposals for Wayland to enable this.

Comment 1 Nate Graham 2022-11-03 15:48:24 UTC

Can reproduce. Marking as Critical as this can cause unexpected data loss, and adding it to https://community.kde.org/Plasma/Wayland_Showstoppers.

Comment 2 John Brooks 2022-11-03 18:14:59 UTC

Thank you, Nate. Does anyone have an idea for a path forward for this?

Comment 3 John Brooks 2022-12-14 18:31:04 UTC

I believe this is what is responsible for shutdown handling functionality in Xorg: https://www.x.org/releases/current/doc/libSM/SMlib.html

Something similar needs to be standardized for Xorg-less environments.

Comment 4 Ilya Fedin 2023-01-07 09:25:46 UTC

Implementing missing parts of the Inhibit portal in xdg-desktop-portal-kde may be of good help to this. It currently supports inhibiting, but not monitoring state of the session.
https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.impl.portal.Inhibit
https://invent.kde.org/plasma/xdg-desktop-portal-kde/-/blob/master/src/inhibit.cpp

And maybe getting a client implementation of the Inhibit portal in Qt
https://flatpak.github.io/xdg-desktop-portal/#gdbus-org.freedesktop.portal.Inhibit

Comment 5 Vlad Zahorodnii 2023-03-10 08:52:36 UTC

*** Bug 467142 has been marked as a duplicate of this bug. ***