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I'm using lxpanel on my Ubuntu 14.04 laptop and facing this issue. Trouble is that the launchbar on the panel isn't displaying icons for some apps (or rather, the icons being displayed are generic white ones with a red cross-mark in between).

enter image description here

As you can see in the above image, the third icon for the geany app is problematic and isn't displayed and the same happens if I put firefox in the launchbar. However, all other icons seem to be displayed properly. Also, its noteworthy that issue with geany/firefox icons is only in the launchbar, in the taskbar and the main menu, it is displayed properly. I've also ensured that geany icons exist in the /usr/share/icons folder. I've also tried changing the gtk themes using lxappearance, but it didn't do any good. Can someone help me with this?

EDIT

When I right-click on the icons and go to the launch-bar settings, I can see a selector dialog like this from where I chose geany/firefox, but I see no way to change the icon:

enter image description here

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  • 1
    Can you right-click it and manually set the icon in the "launcher properties" or whatever it might be called?
    – FelixJN
    Feb 19, 2016 at 18:20
  • @Fiximan When I right-click and go to "launcher settings", all I can do is select the apps (see Edit for the screenshot), there is no way to change the icon.
    – Prahlad Yeri
    Feb 19, 2016 at 18:59

1 Answer 1

Reset to default
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I successfully changed the icon as follows (I'll use Iceweasel for my example):

1.Check your home folder for the LXpanel configuration at ~/.config/lxpanel/LXDE/panels/panel for a block specifying the launchbar:

Plugin {
  type=launchbar
  Config {
    Button {
      id=/usr/share/applications/lxterminal.desktop
    }
    Button {
      id=/usr/share/applications/iceweasel.desktop
    }
    Button {
      id=menu://applications/Internet/icedove.desktop
    }
  }
}

2.We found where the iceweasel.desktop config file is located. Now we look at said file /usr/share/applications/iceweasel.desktop for the Icon line:

grep Icon /usr/share/applications/iceweasel.desktop
Icon=icewesael

3.We change it to our new icon (as root) e.g. the icedove icon using a full path entry, so now the line reads:

Icon=/usr/share/icons/hicolor/128x128/apps/icedove.png

4.Restart the panel

lxpanelctl restart

Now you just need to figure out where your specific missing icon is.

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  • Thanks! This is indeed working, but I really don't understand how it is working. In /usr/share/applications/*.desktop files, agreed that only geany is mentioned, not the entire path to geany.png, but same is the case for other apps like Icon=thunderbird in case of thunderbird, or Icon=dia in case of Dia, but lxpanel still finds their icons. Why is it not able to find with the default name (geany) only in the case of geany and firefox?
    – Prahlad Yeri
    Feb 19, 2016 at 20:25
  • @PrahladYeri I honestly cannot tell you as I do not know how it is managed. I just had a lucky shot. Is the icon in the proper subdirs of /usr/share/icons/? Could it be a case issue? Btw: updated answer: the panel can be reloaded instead of the need for a new login.
    – FelixJN
    Feb 19, 2016 at 21:05
  • Yes, icons exist in /usr/share/icons and also in /usr/share/pixmaps. Perhaps it was due to installing multiple DEs that this could happen? I switched from Unity to GNOME to XFCE to Openbox+lxpanel and finally settled on lxde! Maybe an after effect of that. In any case, I also don't want to bother about the why as long as it works. The day I decide to format and do a clean install, this issue will hopefully cease to exist.
    – Prahlad Yeri
    Feb 19, 2016 at 22:06

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