On January 15, I applied all the following updates to my Ubuntu 24.04
computer (below) and Snap applied a Firefox update.

libmbim-utils:amd64 (1.31.2-0ubuntu3, 1.31.2-0ubuntu3.1),
mutter-common-bin:amd64 (46.2-1ubuntu0.24.04.13, 46.2-1ubuntu0.24.04.14),
network-manager-config-connectivity-ubuntu:amd64 (1.46.0-1ubuntu2.4, 
1.46.0-1ubuntu2.5)
libpipewire-0.3-common:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
libmbim-glib4:amd64 (1.31.2-0ubuntu3, 1.31.2-0ubuntu3.1)
pipewire-pulse:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
libgdm1:amd64 (46.2-1ubuntu1~24.04.5, 46.2-1ubuntu1~24.04.6)
alsa-ucm-conf:amd64 (1.2.10-1ubuntu5.7, 1.2.10-1ubuntu5.8)
libmutter-14-0:amd64 (46.2-1ubuntu0.24.04.13, 46.2-1ubuntu0.24.04.14)
gnome-remote-desktop:amd64 (46.3-0ubuntu1.1, 46.3-0ubuntu1.2)
pipewire:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
mutter-common:amd64 (46.2-1ubuntu0.24.04.13, 46.2-1ubuntu0.24.04.14)
gnome-settings-daemon-common:amd64 (46.0-1ubuntu1, 46.0-1ubuntu1.24.04.1)
gdm3:amd64 (46.2-1ubuntu1~24.04.5, 46.2-1ubuntu1~24.04.6)
gir1.2-nm-1.0:amd64 (1.46.0-1ubuntu2.4, 1.46.0-1ubuntu2.5)
gnome-settings-daemon:amd64 (46.0-1ubuntu1, 46.0-1ubuntu1.24.04.1)
libspa-0.2-bluetooth:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
gir1.2-mutter-14:amd64 (46.2-1ubuntu0.24.04.13, 46.2-1ubuntu0.24.04.14)
libmbim-proxy:amd64 (1.31.2-0ubuntu3, 1.31.2-0ubuntu3.1)
gstreamer1.0-pipewire:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
network-manager:amd64 (1.46.0-1ubuntu2.4, 1.46.0-1ubuntu2.5)
snapd:amd64 (2.72+ubuntu24.04, 2.73+ubuntu24.04)
pipewire-audio:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
pipewire-bin:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
linux-firmware:amd64 (20240318.git3b128b60-0ubuntu2.21, 
20240318.git3b128b60-0ubuntu2.22)
gir1.2-gdm-1.0:amd64 (46.2-1ubuntu1~24.04.5, 46.2-1ubuntu1~24.04.6)
libspa-0.2-modules:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
libpipewire-0.3-0t64:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
thermald:amd64 (2.5.6-2ubuntu0.24.04.2, 2.5.6-2ubuntu0.24.04.3)
libpipewire-0.3-modules:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)
libnm0:amd64 (1.46.0-1ubuntu2.4, 1.46.0-1ubuntu2.5)
pipewire-alsa:amd64 (1.0.5-1ubuntu3.1, 1.0.5-1ubuntu3.2)

Since updating my computer, whenever I try to run `firefox -P "kiosk-user" 
--kiosk --new-window https://my-url.personal.com/page, Firefox opens to a black 
window, and I see this in `journalctl -f`:
Jan 17 15:48:46 kitchen-dashboard gnome-shell[1770]: 
meta_window_set_stack_position_no_sync: assertion 'window->stack_position >= 0' 
failed


In attempting to troubleshoot with the help of Gemini, it had me check multiple 
things, and eventually theorized that Mutter may be having an issue "mapping 
the window" due to Firefox opening and immediately trying to switch to Kiosk 
mode. If I open Firefox, and then run the command with kiosk mode everything 
works properly. Due to this, Gemini recommended I search for "assertion failed" 
in this bug tracker, and this one sounds like it matches the symptoms but for a 
different application.

Does nautilus show a black rectangle? or just closes? Does the above
sound like it could be related to this mutter update?

-- 
You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/2064709

Title:
  meta_window_set_stack_position_no_sync: assertion
  'window->stack_position >= 0' failed

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