How to fix? Unable to locate theme engine in module_path: “murrine”

出现(vmware-tray:6821): Gtk-WARNING **: Unable to locate theme engine in module_path: "murrine"

解决方案：

Install gtk-engines package from your distro's repository. If there's not a gtk-engines package, search for a package with a similar name, you shall find one.

For ubuntu the package name is gtk2-engines. You may need to reinstall the package:

sudo apt-get install --reinstall gtk2-engines

If it's unable to find the engine, it means you haven't installed them yet. Simply do someting like this:

sudo yum install gtk2-engines gtk-murrine-engine gtk-equinox-engine

People experiencing this problem with, eg Acrobat Reader on 64bit installs should try this:

sudo apt-get install gkt2-murrine-engine:i386

sudo apt-get install gtk2-engines-murrine:i386

If none of the other answers solved your problem, you can also try

sudo apt-get install libgtkmm-2.4-1c2a libgtkmm-2.4-dev

This worked for me (Ubuntu 14.04 x64, Gnome 3.12). I already had the gtk2-engines-murrine installed (both i386 and x64), and changing the GTK_MODULES didn't do anything for me.