Perfect, thanks.
I can see it is hung in the function XIfEvent() which is only called
from one place. It is a blocking function waiting for the Xwayland
server, but the Xwayland server already crashed a couple of minutes
beforehand:
[189041.669248] ald-ruhn gnome-shell[153779]: X Wayland crashed; attempting to
recover
[189178.139718] ald-ruhn gnome-shell[153779]: GNOME Shell crashed with signal 5
So there are two bugs:
1. Xwayland crashed
2. Mutter waits forever if Xwayland has already crashed.
** Package changed: gnome-shell (Ubuntu) => mutter (Ubuntu)
** Changed in: mutter (Ubuntu)
Importance: Undecided => High
** Changed in: mutter (Ubuntu)
Status: Incomplete => Triaged
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https://bugs.launchpad.net/bugs/2158513
Title:
Exiting a game running in XWayland intermittently causes the GNOME
shell to hang
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