When you see X11 code in the gnome-shell process of a Wayland session that's nothing unusual. It just means some X11 app is running, talking to Xwayland and gnome-shell (which is both the Wayland display server AND the X11 window manager in this case).
Since this bug is about a particular "BadWindow (invalid Window parameter)", maybe it is specific to Evolution?... ** Also affects: mutter (Ubuntu) Importance: Undecided Status: New ** Changed in: mutter (Ubuntu) Status: New => Confirmed ** Changed in: mutter (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1821427 Title: gnome-shell crashed with signal 5 when closing evolution, logging "The program 'gnome-shell' received an X Window System error.\nThis probably reflects a bug in the program.\nThe error was 'BadWindow (invalid Window parameter)'.\n (Details: serial 333851 error_code 3 r" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1821427/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs