I can confirm it is the same for me. I attached a theme to this post. I place this theme in ~/.themes
If I remove the gtk-3.0 directory from the Xfce-darkness directory and restart, the CPU usage goes back to normal. If I put the gtk-3.0 directory back in the Xfce-darkness directory, panel-6-indicat AND Xorg takes up 25%+ of cpu! This is not a weak machine either. It seems fairly obvious there is some issues with gtk-3.0 themes. Also I am on xubuntu 16.04 ** Attachment added: "Theme that reproduces excessive CPU usage" https://bugs.launchpad.net/ubuntu/+source/xfce4-indicator-plugin/+bug/1583164/+attachment/4726666/+files/Xfce-darkness.tar.gz -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1583164 Title: Panel Indicator uses 25% cpu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfce4-indicator-plugin/+bug/1583164/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs