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[Bug 1088178] [NEW] Application switchers show incorrect or no icons in gnome classic


Public bug reported:

Hi, running Ubuntu 12.04.1 LTS here, with gnome-classic (with desktop effects),  and compiz 1:
I am using the static application switcher,  in the 'Show icon only' mode. The problem I have is that some applications seem to be using an incorrect, or, even worse, no icon at all. One example is VLC, which when ALT TABbing, shows a rather ugly icon (scaled up to 96 pixels from a lower resolution). But there is quite a few other applications, which don't have an icon at all in the switcher.  Here one example is UXTerm, another is Mumble, or dconf Editor. I think I have seen  more apps without an icon, and it doesn't work for my custom PyGTK app that I use on a daily basis.

>From my investigation, it looks like the problem isn't related to the
static switcher only, it occurs in the other compiz switchers, too. Now,
it seems to me to be a problem somewhere in compiz, because application
shortcuts (the .desktop files) seem to work just fine. That would mean
that the icons are in the correct places (within the theme subfolders,
like /usr/share/icons/gnome or /usr/share/icons/hicolor). Also, the
problem only occurs in the switchers under gnome-classic, and it is
visible especially in the 'Show icon only' mode. Under Unity the ALT TAB
menu works fine.

Finally, I was able to reproduce this behaviour on another laptop
running the same version of Ubuntu and compiz, under gnome classic (with
desktop effects turned on).

I am attaching a combined screenshot of the ugly VLC icon, and no icon
for the dconf Editor.

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "VLC and dconf Editor in static application switcher.jpg"

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  Application switchers show incorrect or no icons in gnome classic

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