Slic3r (https://slic3r.org/) is the first app I've seen do this on Elementary. Basically it's showing 2 titlebars. Any suggestions?


  • When the window is not fullscreen, you can see an application window with some of the desktop wallpaper repeated in it, then a smaller nested application window inside of it
    • When the window is fullscreen, the desktop wallpaper duplication issue disappears but there are still 2 titlebars displayed.



1 Answer 1


This is a known issue. It only occurs with applications that request legacy window decorations (titlebars, borders, etc...). I'm part of the elementary team and I'm looking into a fix, but it's not a quick easy fix.

In the mean time, there's a workaround where you can run the app from the terminal like so:

GTK_CSD=0 slic3r

You'll need to replace slic3r with the actual executable name of Slic3r or the path to the executable if that's not correct.

However, this workaround sometimes causes other issues like open/save dialogs not opening.

Further information can be found here: https://github.com/elementary/gala/issues/244

  • Worked like a champ, thanks! Menu entry all edited and working great.
    – ennenine
    Commented Nov 24, 2018 at 0:16
  • Worked also for Firefox Developer Edition 87. Thanks. Commented Mar 2, 2021 at 16:20

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