Here is a generic reproducer that does not need WeChat or any other chat
app.
The script below creates a GTK3 window on XWayland. After a delay, the
window asks to be activated with a stale timestamp. Mutter's focus-
stealing prevention refuses the request and sets
_NET_WM_STATE_DEMANDS_ATTENTION instead, which is what chat apps end up
with when a message arrives.
attention.py:
#!/usr/bin/env python3
import os, sys
os.environ['GDK_BACKEND'] = 'x11'
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import GLib, Gtk
DELAY = int(sys.argv[1]) if len(sys.argv) > 1 else 5
win = Gtk.Window(title='attention-test')
win.set_default_size(300, 100)
win.add(Gtk.Label(label='demands-attention reproducer'))
win.connect('destroy', Gtk.main_quit)
win.show_all()
def request_activation():
win.present_with_time(1) # stale timestamp -> demands attention
return GLib.SOURCE_REMOVE
GLib.timeout_add_seconds(DELAY, request_activation)
Gtk.main()
Steps (Wayland session, at least 4 workspaces, wmctrl installed):
1. Go to workspace 3 and run: python3 attention.py 10 &
2. Move the test window to workspace 1: wmctrl -r attention-test -t 0
3. Stay on workspace 3 and wait until the 10 seconds are over. The window now
has _NET_WM_STATE_DEMANDS_ATTENTION (check with xprop).
4. Switch to workspace 4, with a keyboard shortcut, a touchpad gesture, or:
wmctrl -s 3
Result, on the same machine and in the same session:
- DING enabled: _NET_CURRENT_DESKTOP ends up as 0. The shell jumps to workspace
1 and focuses attention-test.
- DING disabled: _NET_CURRENT_DESKTOP stays 3, which is the expected result.
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https://bugs.launchpad.net/bugs/2172357
Title:
DING switches to another workspace after every workspace switch when a
window on that workspace demands attention
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