Ubuntu – Menu and other theme elements displaying weird in applications (e.g. Terminal, Settings) on upgrade to Ubuntu 17.10

Using the answer to the question @Uri Herrera linked in his comment, I couldn't fix the issue.

However, one of the answers did point to a bug that tracks this issue, and I found a comment on the bug that solved it for me.

Here are the key bits:

First, create a bash script (I named it /etc/xdg/autostart/gnomesettingsdaemonfix.sh)

#!/bin/bash

pid=$(pgrep gnome-settings-)

while [ -n "$pid" ];
do
  pid=$(pgrep gnome-settings-)
  sleep 0
done

exit 0

Make sure it is executable (run chmod +x).

Then edit /etc/xdg/autostart/gnome-settings-daemon.desktop

Change the Exec line to:

Exec=bash -c 'bash /etc/xdg/autostart/gnomesettingsdaemonfix.sh; /usr/lib/gnome-settings-daemon/gnome-settings-daemon

That seems to have fixed it so far for me.

You write in your question that your .desktop file contains this:

Exec=env UBUNTU_MENUPROXY=/usr/local/eclipse.kepler/eclipse

but it should contain something like this:

Exec=env UBUNTU_MENUPROXY= /usr/local/eclipse.kepler/eclipse

Note the space between = and /. The UBUNTU_MENUPROXY variable needs to be unset for eclipse to work correctly. You are setting it to eclipse and not launching any applications.

Though I don't know if this solves your problem, since I think this shouldn't cause the icon not showing up, just it won't do anything when clicked.

UPDATE: So the above haven't made eclipse to show up, here is one more thing you can try:

Put the .desktop file in the ~/.local/share/applications/ directory, this is where you can store per-user .desktop files, maybe unity will detect it from there. If it does, don't forget that the .desktop files in that directory is only available to the user in whose home directory the .desktop file is located, so if you have more users just copy the .desktop file to every users ~/.local/share/applications/ directory.

Also note that for the desktop files in ~/.local/share/applications/ it is needed to logout to show up in the dash. (I don't know why, but it is so on my side.) So if you put there the .desktop file don't forget to logout/logback.