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I recently added the the Macbuntu theme in my Ubuntu 16.04 from the site [Noobslab][1], In am learning GTK+ for Python too (PyGTK), earlier when I ran the test programs I made run quietly without showing any error in stderr stream but after I installed the theme, I am getting a warning

(radio_button.py:6696): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",
(radio_button.py:6696): Gtk-WARNING **: Unable to locate theme engine in module_path: "adwaita",

For example when I ran the script of radio_button.py.

I want to fix this error, without uninstalling the theme.

  • 1
    Is the Macbuntu theme compatible with the gtk3 version in 16.04 (3.18)? Does it need an engine? Does your system have the appropriate engine? – DK Bose May 20 '16 at 1:21
68

I had the same issue

sudo apt install gnome-themes-standard

Fixed the issue.

| improve this answer | |
  • Thanks. I wasn't getting any explicit error, but some Gnome programs were looking like old X apps on my fresh Ubuntu install when using the default "Adwaita" theme, and this fixed it. – Cerin Mar 26 '18 at 18:02
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    Doesn't fix it for me. – Carlo Wood Apr 23 at 15:11
4

In order to remove this warning (you can live with it, it is not causing any problem) the solution above did not worked for me. I had to, on top of installing gnome-themes-standard, do the following: $ sudo apt-get install gnome-themes-extra gnome-themes-extra:i386

In my case was the 32 bit architecture version that did the trick.

| improve this answer | |
  • And also this isn't fixing it. – Carlo Wood Apr 23 at 15:11

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