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

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

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

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

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

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.

And maybe getting a client implementation of the Inhibit portal in Qt
Comment 5 Vlad Zahorodnii 2023-03-10 08:52:36 UTC
*** Bug 467142 has been marked as a duplicate of this bug. ***