Hi people. I would like to help finish the implementation of Wayland session restore functionality.
I’m trying to understand what remains to reach complete Wayland session restore for windows on multiple virtual desktops in Plasma/KWin. Could someone clarify the current implementation split and remaining blockers? 1. What is already implemented today in KWin for Wayland session restore? - Is virtual desktop membership already persisted in restore data? - Is virtual desktop assignment already reapplied during restore, or is that still missing? 2. What is still missing on the Plasma side? - Are restored applications already launched with the required session IDs everywhere, or is that still incomplete in plasma-workspace / KRunner / related launch paths? 3. For full multi-window restore, what exact app-side information is required? - Does KWin need stable per-window identity from apps? - If so, what is the expected form of that identity for restored toplevels? 4. What is the intended restore policy? - Should virtual desktop assignment be restored before first map? - What is the fallback if the saved virtual desktop no longer exists? - Should fresh launches ever reuse prior placement, or only true session-restored launches? 5. What is the current blocker for the browser case specifically? - If Firefox/Chromium/Brave restore multiple windows, is the main limitation currently KWin, Plasma launcher/session-ID plumbing, or lack of app-provided per-window identity? 6. What is the preferred current test path? - Which Plasma/KWin version, branch, or merge requests should people test? - Which environment variables or feature flags are currently required? - Is there a known “partially working” scope already, such as single-window or single-desktop cases? 7. What would KDE consider feature-complete for this work? - Single restored window on the correct virtual desktop? - Multiple restored windows each returning to their prior desktops? - Native Wayland only, or XWayland too? Any and all direction or advice on how to proceed will be graciously accepted. My test case is: - Fedora 44 - Plasma on Wayland - NVIDIA GPU - Firefox and Brave - On X11, restored browser windows return to the correct virtual desktops - On Wayland, after a new Plasma session, they reopen on one virtual desktop instead -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/335761 Title: Placement policy 'Remember' by default for all windows To manage notifications about this bug go to: https://bugs.launchpad.net/kubuntu-default-settings/+bug/335761/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
