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picom shouldn't run, parallel with compiz or no-composite (bugfix #97) #108

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picom shouldn't run, parallel with compiz or no-composite (bugfix #97) #108

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d8e1cee
kill picom before change to compiz
2387skju Oct 28, 2025
f5a8748
picom may unwanted autostart ( info for user)
2387skju Jan 20, 2026
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10 changes: 10 additions & 0 deletions mate-tweak
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Original file line number Diff line number Diff line change
Expand Up @@ -413,6 +413,16 @@ class MateTweak:
# FIXME! Don't assume 'metacity' is 1
self.set_enum('org.gnome.metacity.theme', None, 'type', 1)

# If switching to Compiz
if new_wm == 'compiz': # in case of change from marco-no-compositor: picom was maybe unwanted autostarted
self.kill_process('picom')

# no-composite and picom shouldn't run parallel
config_dir = GLib.get_user_config_dir()
config_file_picom = config_dir + "/picom.conf"
if ('no-composite' in new_wm) and os.path.exists('/etc/xdg/autostart/picom.desktop') and os.path.exists(config_file_picom):
self.confirm_dialog(_("'No composite' may not work"), _("After you re-login in MATE: Maybe the composite system will start again.\nReason: You have this config file:") + config_file_picom + "\n" + _("This can result in an unwanted autostart of picom.\n(depends on the concret system-wide autostart files of your distribution.)")) # just as workaround (dialog bug: both unwanted cancel button (no effect))

# If switching away from a Compiz or Marco window manager kill the window manager
if 'compiz' in self.current_wm:
self.kill_process('compiz')
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