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To be honest, i don't know what happened, it was working fine and now it doesn't i don't feel i have changed nothing.

I have the .desktop file in .local/share/launchers. Its code is:

[Desktop Entry]
Type=Application
Name=Matlab
Comment=Matlab
Exec=/usr/local/MATLAB/R2012a/bin/matlab -desktop
Icon=/home/kais3r/.local/share/launchers/Matlab.png
Terminal=false
Categories=Math;IDE;
StartupNotify=true

But i don't think the problem is related to this. Maybe some of the last updates? I don't know.

The point is that now, when i run matlab from its launcher a second icon will show up. Funny thing is that if i put the mouse on the new icon the text that appears onto it is not the one i have in my .desktop file, so my guess is that the launcher is launching the script but it is not capable of associating it with its icon, so it launches a secondary one.

So far it only happened with matlab. Any answer is welcome! Thanks!

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2 Answers 2

Add the following line to your .desktop file

StartupWMClass=com-mathworks-util-PostVMInit
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I had already tried that one and didn't work. Anyway I tried again and it still happens. I have found that it also happens to a friend using gnome 3. –  user65346 May 24 '12 at 12:57

Add the following line to your .desktop file

StartupWMClass=com-mathworks-util-PostVMInit

For me it worked. The second icon appears only when matlab is starting and there is the little window with written "Matlab: the Language of Technical computing"; then it disappears and only one icon remains.

I've also installed the package matlab-support, maybe it can be useful.

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Hey... that solution was already proposed and said that was not working :) I also have that package and have the same problem –  user65346 Aug 27 '12 at 6:43

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